Without any reads I'd probably lean towards folding here. I just don't see many hands that can raise the river here. I don't see much air here and wouldn't be surprised if he showed down quad 5's. Maybe AT3x or something along those lines.
Gotta pump the brakes once you see a river unimproved. Turn is a tricky spot with worst position and few nut outs - even against softer lineups.
River your best two options are check or betting small without reads / known leaks on opponents - don't think i would go more than $50 - this functions as part value / part block bet. If you check villain may bluff or value bet worse tx - hero can fold if he doesn't think villain bets worse than at.
As played, i think this is mostly a standard fold. Note villain can have a very wide range closing action from bb so many of his boats are credible / more likely. He could also call strong hands on turn trying to keep fish in and wary of overcards that could counterfeit his boat. A strong opponent can turn a worse tx or chop into a bluff, but this should not happen enough for us to be too concerned about it.
Of course, in this type of game, if something about the guy seems off - i will look him up - this is exactly the type of runout where newer plo players or nl players trying to learn are going to have shaky bluffing and value raises and we can pick them off in auto-pilot mode.
If he's turn flat range is T+,33,55 then we are 37/63 behind OTR, so clearly no vbet.
the more OP+OESD, OP+FD type of hands he has OTT, the more we're interested in vbet.
If he's turn flat range is T+,33,55 then we are 37/63 behind OTR, so clearly no vbet.
the more OP+OESD, OP+FD type of hands he has OTT, the more we're interested in vbet.
vs unknown I'd bet/fold probably.
Ya i very much agree bet/fold river over anything else, just need to adjust my sizing