Nobody that can be verified had made any commissions from his power flipper. .it is to bad all the sharks out there turning this into a whore industry.

How much of a credit do they offer at closing to cover the servicing fee?

What matters more is whether the borrower in question has the (i) time, (ii) contacts, (iii) experience, and (iv) ability to effectively communicate & package their loan request to banks & credit unions in a way that is compelling to those lenders. 

For example, I mention that every adult must pay a $XX application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

Quote from @John Williams: Has anyone been on the lender side of private money and had a bad experience that they are willing to share?

Quote from @Matthew Becker: I would consider a C a bad property.  

when I was buying notes I did not even run credit.. but I only paid 10 to 20 cents on the dollar. 

For example, I've used several banks for loans: Flagstar Bank, All Western Mortgage (a broker), PenFed Credit Union (HELOC), NewRez and probably a couple others I'm forgetting.

My credit score is currently 807 if that changes anything. 

It's likely a scam anytime they sound like AI or the grammar is weird or they use the word "kindly", if they ask for you to respond to them off-platform, if they say their employer will pay for it, if they ask if the dates they've specified are still open (when they can clearly see they are open on your calendar), if they ask for a video of your property (they probably want to set up a duplicate listing with your photos and video and scam others out of money), or if they want a long term booking and they have just joined the platform and have no reviews (could have been evicted from somewhere else, and hope a newbie will let them in with no background check, they'll end up not paying or credit card is bad).