There's still 4 people left to act behind, and ATo is a dominated hand. Easy to get in way too deep with a loser, or have to lay it down to a 3-bet. I'd play it from button but that's about it. There's enough other opportunities at micro stakes to forgo playing these marginal hands while still making lots of profit. If I was playing players that actually noticed how I was playing, I might play these to balance my range. Since I'm not, I gladly only play my strong hands and bet for value.