I must abide by the law and trust that mandate enforcement occurs even though I don’t see signs of it.

You’re acting as the assignor, so once the assignment agreement is signed, the buyer takes on the financial responsibilities outlined in the PSA, including the EMD submission.

The experience of the housing provider is going to be the real challenge to getting you a set of keys to move in with...they have to qualify, pass inspection, sign a bunch of paperwork, and finally lease up and send everything into LMH. 

A fourth got four accepted clients, and during the lease signing, they all bailed and the client smartly pivoted to MTR.

If you end up giving them the notice to vacate do not offer the option to sign a lease.

I was sent an addendum to extend the closing date but did not sign it.  

Right now I'm signed up with holdfolio, think multifamily, and disrupt equity.

The assignment agreement addendum was signed a few weeks into escrow.I was not worried that this would trigger the seller to back out.  

Does this middle man make a percentage or profit by bringing us to the developers, if we sign through them, with one of ‘their’ developers?

I also could have sued him for my full commission because I had him sign an exclusive buyers agency agreement prior to the showing, had I wanted to.