I did a little more research a couple weeks ago and learned you don't have to wait for the page to load before refreshing again, which I didn't know and made me feel reaaalllllyyyy stupid. I spammed F5 while scrolling Instagram on my phone for 5 minutes then checked my avatar count and saw I had finally gotten the cursed avatar. Still no luck on the neomail addict one, though. If TNT sees you fast-refreshing on the graveyard page, they won't flag you as a cheater, since they know that avatar is a pest. I'm pretty sure they'd be able to see when you got the avatar, so if you got the avatar the same day you were refreshing, they'd be fine with it. However, if you've had the avatar for 2 years and keep going to the graveyard to try to 'get away with' refreshing for REs, that's trouble town.