I think this is a line which goes in cycles in terms of whether it's primarily a bluff or a VB. Without a ton of reads or past hands I think it's difficult enough to know what to do on the river in spots like the one below and you can often be making a large mistake since in my experience the villains frequencies are often heavily skewed towards either bluffs or VB's.

So it makes me wonder what the best way to adjust is. Call a lot on the river? Fold a lot? Depolarize our turn betting range? How does what we might know about the villains turn betting ranges affect or decision in this hand?

Discuss... I guess??

$2/$4 No Limit Holdem
5 players
Converted at weaktight.com

Stacks:
UTG ($203.80)
CO ($549.40)
Hero (BTN) ($388.00)
SB ($90.15)
BB ($400.00)

Pre-flop: ($6, 5 players) Hero is BTN
1 folds, CO raises to $11.50, Hero calls $11.50 2 folds,

Flop: ($26, 2 players)
CO bets $19.5, Hero calls $19.5

Turn: ($64, 2 players)
CO checks, Hero checks

River: ($64, 2 players)
CO bets $52.50,