[TomBrooks]

I think raising is better than calling, but my default play here is to fold.

Often the bettor will have a nine. Say half the time? If he has a flush draw it comes in half the time. He might have a nine and someone else a flush draw.

Someone might see the turn with bottom pair top kicker A2 and a backdoor flush. They're getting 9:2 to call. Almost enough for 6.5 outs. With implied odds, they can call correctly, I think.

There 6 overcards besides a nine to watch out for. Two overcards have 6 outs. Although they should only count them as three and fold, if they have a BD flush also they can probably call correctly.

There are three people left to act. A raise will usually knock most out, but it's harder to knock out three than one or two.

I just dump it. Is that unwise? If raising is +EV, by how much is it plus?