Oh, this one's pretty easy. Making any kind of game is difficult, time-consuming, and expensive. A lot of porn game developers don't have very much game development experience. Games in general have a pretty uncertain return on any monetary investment, and porn games (being barred from most mainstream promotion channels and having extremely limited outlets via which they can be sold) are even more uncertain. The audience for porn games is also pretty used to off-the-rack character assets at this point. So, putting that all together, stock assets are an understandably-overused resource for porn games because they:
- Are easy to obtain and manipulate, even for beginners
- Can be used to quickly populate a game
- Are very affordable, or even free
- Represent very little risk since audiences are unlikely to give developers too much flak for using them
That's basically it! Nothing too complicated!
