I get that they have to make money, so some ads are expected. However, the amount of them right now is just insane. Do you need to undo some pieces because you forgot to put one in? Get ready to watch an ad for EVERY. SINGLE. TIME. that you press the undo button. Every time. There’s no “oh you just watched an ad, we’ll wait like fifteen minutes before playing another one” nope, just another ad right away and every time you press that button. So don’t make mistakes or else you’ll be very annoyed with how long it takes to fix.