Assuming they can figure out your identity on those sites, yes. But you also generally know when you lose it, so you can go deactivate it through a backup chann

Assuming they can figure out your identity on those sites, yes. But you also generally know when you lose it, so you can go deactivate it through a backup channel. Having a keyfob to log in is pretty standard security practice. The only thing that makes a ring different or interesting is that it's an easier form factor, and I presume it would have wireless capabilities so you don't have to actually plug it in for it to work.