Obviously, if you say on the phone to a car dealer that you want a car and then you call back and say you changed your mind, nothing will happen.
Where I live, verbal contracts are just as valid as written contracts. And it's allowed to record any conversation you're having, which makes it easy to prove.
I would not dare to speak instead of LV but, however, I believe that he did not understand the whole case from the beginning and he understood it when he said this:
I thought of it as a bet, but you're right, it was an offer.
It still feels like
tricking someone into having an excuse to create a scammer Flag. It was obvious nobody is going to pay $2000 for posting a link.
How about this: "The next user who posts after me, agrees to pay me 0.1 Bitcoin." That sounds like a casual agreement to me.
But it shouldn't be allowed!