Did I bet too much with my turn bet? I'm afraid of another spade on the river giving someone a higher flush, or maybe someone has trips and the board pairs. However, if I bet half pot maybe get two callers.

Ignition HOLDEM No Limit Stakes: $0.25-$0.50
Seat 1: Big Blind ($14.85 in chips)
Seat 2: UTG ($66.71 in chips)
Seat 3: UTG+1 ($90.85 in chips)
Seat 4: UTG+2 ($73.32 in chips)
Seat 5: UTG+3 ($36.54 in chips)
Seat 6: UTG+4 ($25.03 in chips)
Seat 7: UTG+5 ($40.49 in chips)
Seat 8: Dealer ($14.25 in chips)
Seat 9: Small Blind [ME] ($49.50 in chips)
Dealer : Set dealer [8]

*** HOLE CARDS ***
Small Blind [ME] : Card dealt to a spot [4s 3s]
UTG : Folds
UTG+1 : Folds
UTG+2 : Folds
UTG+3 : Raises $1.50 to $1.50
UTG+4 : Calls $1.50
UTG+5 : Calls $1.50
Dealer : Folds
Small Blind [ME] : Calls $1.25
Big Blind : Calls $1
*** FLOP *** [Qs 2s As]
Small Blind [ME] : Bets $3.57
Big Blind : Folds
UTG+3 : Calls $3.57
UTG+4 : Folds
UTG+5 : Calls $3.57

Pot is now $18.21
*** TURN *** [Qs 2s As] [6h]
Small Blind [ME] : Bets $12.98

What reads did you have on villains and bb to make calling pre a good play?

As played I'd bet bigger on the turn. You got 2 calls I'd make it way closer to pot and even consider just shoving. Sure Ks probably has to fold but AJs or KsQ is probably calling a big bet. So let it rip.

Also quit betting because your fear of the next card bet to extract max value when you have a hand you want to get value with. If you had reason to know that villains are folding to any bet >$4 here is say make it $4. Sure they are getting the right price to draw, but you are getting value there. In this case readless I think ripping it makes the most sense though.

No reads yet, just 5/1 pot odds and the kind of hand that plays well multi-way.

I still am not sure I would like this. Your points are valid but I don't think it plays as well here as it needs to.

1) we are oop on every street moving forward
2) we aren't closing action
3) when we flop a draw (one of the best outcomes) we almost never flop a draw to the nuts.

To me #3 is important.

We are super happy when the flop comes 56Q. That said we have 4 clean outs here. A 7 is ok, but let's assume the 7 comes and we get lots of heat. Sure we are going with it but you know you have that feeling of "oh ****"

#3 is why I'd fold this hand but I might play 67s, 75s, and 64s

Either way it's probably close. If bb is really passive then I am ok with calling. If someone like me is sitting in the bb where they are probably 3! Pretty wide here with all that dead money. So in that case I'd just fold here.

Also the more I think about it the more I dislike a shove on turn like I mentioned above. I think something between your bet and pot is fine.i don't dislike your bet size. I do still feel that smaller is bad here without specific reads.

I don't really like playing this hand from the SB. It looks attractive given the pot odds, but I don't think that's enough. Obviously it completely misses tons of flops, but there are also reverse implied odds; you make weak flushes, low ends of straights, weak pairs, etc. Plus you're not closing the action.