NL5 SH Zoom A9o from BTN

raising the turn isolates yourself against the better end of his range like flush draws and overpairs while calling keeps his entire range him which is weak and allows him to bluff the river again.

on the river i dont think theres any value in betting, i wouldnt expect him to call down with A high (unless you think he could) so i would check back

cgf

And what about the 3bet from SB, is it a good play from him? Are his intentions based on potential thin value or is it a bluff, what do you think?

sb 3bet is a bluff and is counting on fold equity on pre/ on later streets to make his play profitable.

Usually sb 3brt is around 8-12% and may be as wide as 20% and the intention is to usually take down the pot and sometimes see the flop with initiative with a hand that has high playability. It would usually flop nothing or some sort of good draw or monster.

And what is his best line when he hits TP? Villain IP can call better Axs thus giving SB reverse impileds in this case or am I missing smth?

Firstly you are right that we could have reverse implied odds if his 3brt range is tight and consist of AT+ and if that's the case we should fold A9o but usually it also consists of all Ax suited so against A2-A8 we are actually doing pretty well.

Secondly the odds of hitting an A when he has an A is actually pretty low, there are only 2 cards left in the deck and that's as good as hitting a set so we don't have to worry too much about it.

Thirdly the best line to take when we hit top pair is to usually take a passive line and call and allow sb to bluff because usually raising gets no value from worse hands and sb would be willing to bet on many scare cards like TJQKA as a bluff