I feel like Harv's island also gives you access to posters of the amiibo used, but maybe the camping option for the ATM does the same when you unlock amiibo there as well. Granted the only ones I have are Resetti and Rover. I'll have to try being there next Tuesday, but given I'm in California the shops on my island will be closed. At least most of my island redesign is finished. Should have the villagers moved by next Tuesday. I think the movement of the mailbox is when you fully pay off your house, but I haven't fully paid off my house so I don't know.
@RyG13 Btw, I was able to pick up my mailbox after only a couple upgrades. For some reason, they don't tell you about it until you get a second floor, I think, but you can do it earlier. You can't drag it around, but you can pick it up and move it.