1/2/5: Is it a leak to flat 77 preflop in this spot?

Flat is really good here. Good if you get a 4-way single raised pot. You are printing playing 77 4-ways.

I'm going to say this is false but it's fine-ish to flat yes.

It’s all about the ‘situations’ and you have a good read of it here. It’s a pretty big open, so I would not call it a nitty fold. However, the implied odds & hit or miss simplicity of playing this hand probably make it a decent gamble.

I think most of the 3bet or fold theory has to do with acting first. It’s hard to play hands OOP, so you play a strong range fast and deny equity. But I think even the solvers will flat the small pairs.

I would be worried about one or both folding to cold call $30. That's a pretty big raise to call and you don't hit a set ~88% of the time.

It's kinda mid. We have two players left to act behind us. They could squeeze. We have no reads on BTN, so raising is dicey.

I dunno. If the game is playing loose passive, and / or if we think BTN is TAG, it's probably fine. If BTN is LAG or the game has lots of 3B/squeezing, I'd prefer to 3B, not flat.

Call is about 25-28%. You’re getting exactly 3-1 after rake. OOP v two whales & an unknown MAAG. $600 eff.

Yeah flat’s fine, fold not terrible either.

$600 effective, you're putting in 5% of your stack. You really have to know the other 2 will call and not squeeze. If both call, you would call $30 to see $90. 3-1 expressed odds. You will need to win about $150 to break even if you are purely setmining. With $120 in the pot, it should not be a problem to win over $150 over 3 streets

Not my favorite spot, but mostly in game I would just flat. Folding is tight, but not unreasonable.

I wouldn't 3 this hand. Could fold in a 2/5 game this shallow if you think there is a good chance of a 3! or that the limpers won't call.