Anonymous fast fold tables...

Ignition - $2 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BB: 123.54 BB
Hero (UTG): 100 BB
MP: 96.5 BB
CO: 86.31 BB
BTN: 204 BB
SB: 294.13 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has J A

Hero raises to 2.5 BB, MP calls 2.5 BB, CO raises to 6 BB, fold, fold, fold, Hero calls 3.5 BB, MP calls 3.5 BB

Flop: (19.5 BB, 3 players) Q 9 J
Hero checks, MP checks, CO checks

Turn: (19.5 BB, 3 players) 2
Hero checks, MP checks, CO bets 13.9 BB, Hero calls 13.9 BB, fold

River: (47.29 BB, 2 players) 7
Hero checks, CO bets 33.97 BB, Hero calls 33.97 BB

On the turn, I felt like bluff catching vs. either of these recs was the way to go since Ignition recs like to spew in bloated pots. When CO bet the river despite the flush coming in, I actually felt like it was a sign of desperation that he decided to bet pretty big again. He seemed to be arguing that he checked back 2 pair+ or checked back a flush draw on the flop, and both seemed unlikely to me. Look okay?

Thanks for any help!

Pre is marginal guess odds are too good to fold.
Fold turn, very bad bluff catcher and you still have one player behind you.
Recs will check more strong hands/draws then regs they love playing tricky with nuts.
Riv is kind whatever probably fold. He can show up with any hand that is KQ+ imo.

I'd definitely call turn.
I'm probably folding river.

There are a few flush combos that make sense here: A9dd, T9dd, 98dd
Though the turn bet is kinda weird.

To me our hand looks like a pure bluff catcher, there are no possible worse value hands making this bet.
As a rule I'm folding in these spots, because the pool is not even close to bluffing often enough in these spots to make bluff catching +EV.

We need to win 30% of the time to make a +EV call.
Since villain never has worse value here, that means he needs to be bluffing 30% of the time.
It's a pretty scary card, so it's possible villain is bluffing a lot here, but probably not 30%? More like 20-25% if he's bluffing a lot?

What stake is this? Is it 2NL or 200NL? ($0.02 or $2 big blind?) I assume it's 2NL (0.02)?
You posted a 50NL hand yesterday, what's with the sudden change in stake?

Looks good to me. CO is gonna spazz with enough worse hands and misses overcards to make it worth it.

I get really confused as to what makes a good bluff catcher after he checks the flop. Isn't blocking JJ, AA, and AQ good? I guess maybe we want to unblock Ax since he might use AK, AT, or Axs as a bluff. I don't understand why my hand is so bad as a bluff catcher.

This is 200nl. Ignition doesn't have 100nl fast fold tables, so I have to move all the way up to 200nl from 50nl if I want to keep playing fast fold. To play 100nl, I would have to play regular tables which I hate. Too slow!

I feel like these players who raise for goofy sizes pre are so much more likely to spaz out post. But like Haiz pointed out, I was indeed worried about a weird slowplay. Some players might get scared with AQ, KK, AA when they see such a wet flop and wait until a safe turn to start betting.

Seems fine. We're gonna run into a value-bluff occasionally but that's OK

When bluff caching ott it's much more important to have equity vs his value hands blockers are less relevant. This hand has only two clean outs.
Pretty much any hand in your range has some kind of pair+draw and it's better call. Also MP is getting very good odds on call after we call which hurts our EV.