I dont know if we can dulge into 'what the min-bet signals' too much at these stakes, as the donk who makes these min-bets usually doesnt know what signals he's trying to send out, and likes to bet for the sake of it. I wouldnt be suprised if they bet the min beause its easy.

At higher levels of play we would be able to go into this much deeper (if it even occurs at higher levels), but at these stakes the best play is just to raise and punish their awful play.