For the sake of clarity: They won't actually pay you. You will, if you choose, profit more from your experience with them than you would have, had you actually taken the listing.

How do I do that sensei? This is where the sharp agents say "DUH!". Do this...Call the seller or drop by and ASK THEM what it was that caused them to list their home with the agent they chose. Then THANK THEM for their honesty and their time AND compliment the agent that they chose to list their home with.

The bigger test: If you cannot bring yourself to ask, to thank them AND compliment the agent that they chose to list their home with, then THEY probably made the right choice by not choosing you.

This indicates that you are probably NOT learning-based, that your EGO is standing between you and your success and that you do not see your fellow REALTORS as both your competition AND your valuable business associates.

Lessons:

1) Constantly and purposefully evaluate your wins and your losses so as to improve your craft.
Ask two questions: What did I do wrong that needs to stop? What did I do right that I can do better?

2) One minor tweak can exponentially catapult your listing appointment conversion rate.
This is how losing one could set you up to win many many many more.

Here is a sample script for you to use...

"Hi Mr. Seller, this is Sally with ABC Realty. Thank you for taking my call."
      Hi Sally. (awkward moment) We chose list our home with Jake at XYZ Realty.
"I noticed that you did. And that is why I am calling. So that I may have the opportunity to improve, may I ask you ONE quick question?"
      OK.
"What was it that caused you to list your home with Jake at XYZ?"
      Well. He did this or said that.
"Mr. Seller, thank you so much for giving me the opportunity and for taking the time to be honest with me. You made a good choice. Jake is a great agent and I will be happy to show your wonderful home should I have the right buyer for you. Thank you again, and I want to wish you all the best."

That is it!

This market provides zero margin for error, so in order to win, one must constantly increase conversion rates.
I hope that this helps you.

The wrong call with THE WRONG INTENTION that will get you into LOTS of hot water...

"Hi Mr Seller. I saw that you listed with Jake at XYZ and not with me. Bad choice. You evidently did not do your homework. That is expected as most sellers aren't very smart. Good luck selling your home. You'll need it. By the way, why didn't you choose me? When something goes wrong and your home doesn't sell you should call me. Or you can just cancel your listing with Jake right away, do the smart thing and list with me."

Do you see the difference?