Genshin Impact until these last few months had exactly what @onnekas@sopuli.xyz is suggesting on Google Play. You could redeem Google Play points for a voucher that gave you $3 off a real money purchase. Additionally, devs on Reddit would often post codes to give a set dollar amount off of a new app. I’m pretty positive that at least with Google Play, vouchers that can give $X off a purchase are baked into the platform in numerous ways.

I’m not about to suggest that anyone should do mouse/keyboard gaming with anything less than a proper mouse, but in a few cases where I’ve been without a proper mouse, the trackpoint has been indisputably better than a trackpad for gaming. It’s not even close. Mouselook via a trackpoint is basically joystick control and it works pretty much exactly how you’d expect. A trackpad is just chaos mode and probably constitutes a war crime if you’re forcing someone else to do it.