River overbet shoves are extremely profitable at the micros. And, you just need to watch the player type for other exploitable stuff. Last night I had a calling station, like a pure calling station. He would never fold (once he started calling) unless you overbet pot, and if he improved his hand he would bet out. Very easy to play. Yet, I seemed to be the only one at the table who noticed. Everyone else was bluffing off their stacks on the river with missed flush draws (and getting called by things like bottom pair or Ace high). Or worse, they would bet the flop, he would call and the turn would put three hearts out, then he leads out for pot and they shove over him with top pair. Of course he calls with his turned flush. It was insane. Good night for my though.
An example hand to give you an idea of how he was playing:
https://www.cardschat.com/replayer/5qzPgNz
Text Version
$0.02 NL (6 max) - Holdem - 6 players
BTN: 150 BB
SB: 87 BB
BB: 87.5 BB
UTG: 642 BB
Hero (MP): 138.5 BB
CO: 100 BB
SB posts SB 0.5 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.5 BB) Hero has 2
♣ A
♣
UTG calls 1 BB,
Hero raises to 4.5 BB,
fold,
fold,
fold,
fold,
UTG calls 3.5 BB
Flop: (10.5 BB, 2 players) T
♦ 2
♠ 4
♦
UTG checks,
Hero bets 10.5 BB,
UTG calls 10.5 BB
Turn: (31.5 BB, 2 players) 5
♥
UTG checks,
Hero bets 31.5 BB,
UTG calls 31.5 BB
River: (94.5 BB, 2 players) A
♥
UTG checks,
Hero bets 92 BB and is all-in,
UTG calls 92 BB
UTG shows Q
♠ 9
♣ (High Card, Ace)
(Pre 41%, Flop 25%, Turn 14%)
Hero shows 2
♣ A
♣ (Two Pair, Aces and Twos)
(Pre 59%, Flop 75%, Turn 86%)
Hero wins 265 BB
Note: I raise A2s to isolate the bad player for value. I can bet bottom pair for value on the flop and turn because he would bet if he had anything. And, I bet full pot for max value. No worries about sizing smaller, he is calling anyway. He even calls the river bet of 92xbb with Q9o ... queen high, no pair. Full value, no checking behind on this river. I would have also bet a K for stacks too.
My stack is so short here (only a little over 100xbb) because this is shortly after we played a 700xbb pot for stacks on the flop where I had a set and he called with Q2... and rivered a gutshot straight draw. I made it all back and more.