With the apogee promo?

I just got all 3 games and Duke Nukem 3D.
I am hoping I will be able to set these up to work with my Logitech joystick.

I'll get both later, without any promo. Don't want to rip either GOG or Apogee of their money - they are great guys.

Got both some time ago, promo-less.

Hmm, this is a promotion, not a rippoff. They will actually make more money this way, since more people will buy now that the price is lower.

Ripoff and ripoff.
I'm pretty sure GoG has profit margins set so that they're still making money off the promos too without knocking any less money upstairs to the developers.

So to you this promo is basically a rippoff?

I know. They wouldn't be doing that unless it would be good for them in a long play. Still I'm doing what I consider right. I am not a rich person (currently I have $4 and a rather modest payroll is only in Thursday), yet I can afford to pay $6-10 monthly for a game. It's really not much: I'd rather save penny here and there on not drinking beer one extra time or passing on getting ice-cream or something like that. I admire GOG. I want to pay more to them, not less.
Of course 100x5 is more than 20x6, Math isn't that hard to do. It's great how the sales skyrocket when there are special deals around. It's wonderful when people try out games they never would otherwise.
What saddens me a bit, is seeing people talking "I like the game but I'll wait till the special promo arrive". OK. OK. Preserving few bucks saves their day. Maybe. I feel sorry for those guys. Must be hard times they endure, even worser than my own.

What?
It isn't a ripoff of anybody.
It's not a ripoff of GoG or Apogee as they are both still making money.
It's not a ripoff of the customer as we're getting originally cheap games at a discount.

I'm sorry if I failed to articulate my idea in a clear way. I meant not "ripoff" as in "they lose money they had", but as in "they lose money they might had had", which is equally important for business.
This discount deal is a perfectly thought-of one: Blake Stone series doesn't seem so popular on GOG. Might as well stir some interest in them...
But still I'd like to pay full price for it. Any additional dollar counts. I don't think GOG incomes are that big.

Never tried an fps, not even oldschool one, with a joystick...is it any good?

I had a joystick back in the day. Generally, I felt first person shooters played better with plain old keyboard controls... At least until the modern keyboard + mouse combo came about as we know it today.