[flopton]

I think the main reason they limp AK and AQ is to keep the worse aces in the hand, that will often go broke postflop with top pair (Axs, AT+) at the low limits.

I think they also limp, then reraise all in with AK at the low limits. This probably wins the pot uncontested enough and wins flips, to make up for the times you're called by aces/kings.

Also they see slightly more flops than is usually advised by the forum, such as calling in MP with KQs, raising late position with JTs, and completing almost any SB. Players might let you limp more if you have a few limp-reraise hands in your game.