Its weird b/c some games have "credits" to purchase - like old school arcade- insert a quarter, get a credit - continue play. I haven't looked deeper into that b/c i'm against feeling grifted. This is also why I have yet to pay to get past a demo. If I play it and I get hit with a paywall, I just delete the content. Off the top of my head some racing games and platformers operate like this. There are some games that let you play, seemingly w/o restriction, but they have a "full purchase mode" looming for you to click on which cheapens the experience for me b/c I wonder at what point will they stop me and also what is the difference in gameplay b/t the mode I'm playing in and the fully purchased mode their offering. I hate feeling like I'm being pitched to... with a passion.