Hey hey, don't feel down. Check your PM!

Here you go.

I noticed quite a few individual games ([url=http://www.an-ovel.com/cgi-bin/magog.cgi?ver=733&scp=gdspi&dsp=ipgfsorlcmbaxXP0512348&ord=&flt=pla~90~&opt=n&myf=ThuJun230338282016_X7jEgVo5dOSeB]MaGog says there were 29[/url]), plus the big Interplay bundle (90% off if you buy or already own all the included titles).
EDIT: Never mind, there were 21 (+ the Interplay bundle). See here.

What filters did you (and apparently Painted_Doll) use that showed 21? Your MaGog link currently doesn't return any results.

Interesting I just assumed if you didn't opt in before hand it would be over after the promo. Guess not. I'm now dropped to position 99 almost out of the top 100 but it doesn't matter anyway since you only see the top 10 and yourself.

Not really an annoyance with having a sale. If you don't like it just check when it ends and avoid the GOG site until then. No annoyance at all. Hell I'd save a lot of time if I did that, but I'm a completist so I like to own games and sale is the cheapest way (in the long run to do that). If I had more self control then I'd already have enough games to last a few lifetimes. I can see it would be a problem for people with addiction type problems.

Gambling or other compulsive behaviour, perhaps I'm one with my buying.

Hmm, all those people that joined GOG this month and with their first post here claiming they just missed getting Spelunky by 1000 points...yeah, seems legit...

Be careful with giving your gifts, guys!

I thought that maybe one could use the summer sale experience leaderboard data (even only tiny bits of it) to estimate the total amount of sales GOG made. Thanks to GOG for sharing that data. The procedure goes as follows:

1.) Experience divided by 10,000 is roughly the amount of $/€ which was spent per person. (I skip the $ or € currency sign from here on.)

2.) I know at least three positions: place 10 has spent 900, place 1600 has spent 100 and place 15000 (that's me) spent 30.

3.) Typically the distribution behind the leaderboard is exponential. That means, that a few people spent a lot of money and a lot of people spent only a few amount of money. So let's say y=a x^b with y is the amount of money spent and x is the position in the leaderboard and a and b are just two constants that describe the behavior.

4.) If you take the logarithm, the exponential behavior is transformed into a linear behavior and you can use a simple linear fit to obtain the parameters a and b. I did that. a = 2670 and b = -0.46

5.) Now without putting that information in, we kind of correctly guessed the experience of the first guy (x=1 -> y = a = 2670 * 10,000 = 2,670,000, true value = 2,638,130). So the assumption that it is an exponential distribution is maybe not so wrong.

6.) However b = -0.46 tells us that summing up the amount of money spent is not bounded. The sum of y from x = 1 to Infinity is only bounded for b <= -1 if I remember correctly.

7.) But it is bounded anyway, for example by the number of people living on earth, or the number of customers GOG has. But it also may be the distribution is skewed at the long end. I would need more statistics about the higher rankings.

8.) Anyway, assuming something like 100,000 customers took part in the summer sale and the exponential distribution is valid everywhere, even for the very low amounts at higher ranks, I arrive at something like 2.5 million ($ or €). However, the error range is big, I think somewhere between 2 and 4 million ($ or €) is realistic.

9.) While this sounds like a lot , GOG only keeps around 30% of it (kind of industry standard cut), has expenses (servers, staff) and needs to pay taxes on the profit.

10.) So after doing the calculation I was a bit surprised. The total amount, even while sellings of a few millions are nice, seems a bit too low. With the multi billion video game business and the goal to become big I would have expected more like 10 million or more for such a big sale because in the end I rarely (never nowadays) buy outside of sales and can only assume most others do the same. There are only 2-3 big sales on GOG per year.

11.) Looking at the stock quote it's difficult to attribute a direct increase in stock price to the sale. But then CDPR is more than just GOG and the share price has just recovered from a dip in winter and arrived at the highs of last year summer. The next quarterly reports of CDPR reporting sales and profits may give a hint how well GOG does in terms of sales, even if they are only aggregated numbers.

lol i'm starting to feeling it and i have less than 8 hours of sleep in the past 2 days. It's sale's fault! :D

Sadly i only bought Afterlife and i collected enough of points to get Spelunky for free, i was planning to buy few more games, but my wallet was empty :( but hey it was cool sale and i hope you guys do another one around Christmas.

Nice calculations, but did you consider that various users didn't post their scores in the leaderboard?
Also, are you sure that it's correct to approximate\predict such random values with a simple exponential function?

thanks for your concern smart azz, i was just kidding on that part of being broke till the end of this month in this forum....is kind off a bad joke..i guess it was!!
. Yes i do have a job, i can afford it easily up more than amount you mention here. but the thing is i bought other stuff t elsewhere too...and i dont see myself bought more than 8 games in gog for this summer sale.

So save your care and concern for my situation,just move along and reply to those who need it the most.... those guys with 1 post in the forum and missed the seplunky freebie.

Was a nice sale, picked a few games I was interested. + Few freebies you guys did a pretty good job I would say.

Will see you at the next summer sale. And yeah, lets not forget winter is coming!

Well... I personally joined this month because I had never heard of GOG before, my bad! :D
I guess I messed up with the first check-in (I got an X instead of the golden coin), and even if I joined twitch for the GOG challenges I didn't get any XP (I guess I was supposed to play or do something... but it was so confusing...)
Anyway having another on-line platform with great deals on games is always a good thing!

Hey, that's very nice of you, but I'd rather you'd gift it to somebody who'd play it right away/is interested in playing it.
I was mostly just sad I didn't get the freebie =D