What do you get if you pre-order? Better price?
Yes, if you consider the whole bundle because usually you have to pay more than $1.50 to get all the games.
There are bundle's that let you pick which games you have to buy and you end up paying the same or less for just a couple of games.
A couple of times, I've ended up paying the same as in the pre-order for only a couple of games but I've been happy to do that as I've cared zero for the rest of the bundle and I know what I'm buying.
I've pre-ordered other bundles and I've ended up with keys or games that I have no use for. If it was a ShinyLoot, I'd get it but I'm skipping this pre-order.