I was a pretty active user for a couple of months (until my iPod stopped working for a time being). Because of this I wasn’t able to complete some collections I was working towards. However, because of the trading feature I am able to get right back to where I left off, given that people are nice enough to partake in trades, but that has nothing to do with the developers. The UI has changed a bit since O last used the app, but other than that everything works as it should. FYI if you get locked out, try uninstalling and reinstalling the app. As long as you can sign back in you will lose nothing. ?