You can still send tips...I think in-game purchases are only rejected by some players because if you have had this game years when making a successful in-game purchase the game would take off similar purchases and only make other purchases available...so when you purchased all gifts/donations and in-game purchases you can't make anymore purchases. It caps the players contributions! I liked that idea. I ended up having multiple accounts with all donations paid and some purchases for advertising off and always second suit on...to support the Devs! It takes a lot to make games and at some point you probably teach students how to be this successful. It's nice to have a game you can trust.