Gylfe: I don't spend money for anything other than what I need and rarely something I want. I happened to have a nice little stash saved up for this type of occasion. I regularly check GoG to see if they have any good sales or anything new and had a large wishlist. The stuff on my wishlist was almost all for sale, so I figured this is what I saved that stash for. If I didn't have my savings for this type of occasion I would be picking the ones I wanted most and kicking myself for not saving.
Plus I was recently promoted and working insane amounts of hours with no days off, so I figured WTH I need something to reward myself.
But if you are working insane amounts of hours, will you find the time to play all the games you have bought ? I have the same problem, so even if I could spend as much as you, I wouldn't :) I already have too many games that I haven't had the chance to play. I may have more time after I finish my studies, but I doubt it