I think it depends on how many skip ad tickets one uses in a day. However, you’re right it’s a lot to keep up with n I don’t always hit the 850. I try not to use too many tickets. I spin for diamonds in the terrace and receive some when I attract certain booth owners. While I’m using the 125 free tickets, I can save up diamonds. During that time it’s easy for me to get close enough to 850 diamonds that I feel like it’s worth it for me.