Never seen it done though frankly I have not looked. The idea. "I will wait a year and buy the GOTY release" "I will wait until it comes out as part of a deal" Similar phrases get floated around a lot. What if instead you said Pay ?? or more and get it as soon as/at beta and everything afterwards. Pay less than ?? and get it a bit further down the line or just the launch game plus the usual free updates. Sliding scale all the way down to tiny margins after bandwidth costs. Maybe choose locked or unlocked. Devs/pubs would be able to shake things around (less, more, alternative offers, combo deals) if they want. In general marketing there is a term along the lines of "something is only worth what someone is willing to pay", as the one doing the selling you want the most from everybody but people will bitch, piss and moan if they think they are getting a different deal to someone else. However if people are enjoying the silly investments that are kickstarters, paying coffee places so they can pay by phone and other such things I could see it working. Naturally you would want to have incentives for certain behaviours, I am not quite sure people would deal with it right away for some games to trickle in down the line so you would probably frontload it somehow. It might also be a reasonable way to do something like libraries from a developer. Being a cynical bastard when it comes to money everything I am really not inclined to put my money someone I am not earning interest for it.... though interest of a sort (virtual service coins) could be an idea. However many others either have money to burn or are slightly less discerning with their money. If people are willing to wait then maybe you could do something like. I would probably do something like a escrow for the game. Would it work do you reckon? Service profits would be made either by charges (either way), interest on investment pool or something along those lines. Going a bit more long term then user investment pool, auctions,"make an offer" and other things could be considered.