I make a small Mac app called Mark and Scribble, just me building it. A while back some users said they'd like to support it so I added a tip jar with a few small amounts like buy me a coffee. It's been months and I haven't gotten a single tip. Not one. Before I just assume nobody tips, I'm trying to figure out if I did something wrong. My guess is that it might be because the app also has one paid feature (a whiteboard mode you pay once for). So maybe if someone already paid me for that, th...