55% over what sample size?
he could just as easily be going crazy with (A2o, A4o, Jx, 67o, 46o) with a spade, if he has A3o he can also have A5o, so many hand combos of trashy Axo hands + Jxo, 5xss, 3sxx (more hand combos of 5xss)
theres also the theory that bad players always put you on AK (or overs) and hes doing this for protection with his marginal garbage because he thinks hes good and dosnt wanna see another spade / high card roll off, and once again if he thinks you have AK/overs he may do this with his semi-bluffs
hard to find a fold against someone playing that many hands
also psychologically when someone auto pots as a default, feel free to repot it vs them, since its something they will do with their entire range, they wont think too much of it, and it allows you to get a lot of money in when you have a strong range |