Like stated earlier, I'd send a deposit to a well known escort (like Jarrod) who has a lot of RM reviews.
However, last nite, I turned down a deposit request from an RM ad that had only a single review.
Now, I fully understood why they asked for it - it turned out they were further away from me than expected.
However, if they're new and have only one review, I'm not sending a deposit. I simply acknowledged that they were too far away and wished them good luck. I'm not unhappy with them, but it was simply an unlucky situation for them.
DrownedBoy's post in Is last minute the new planning ahead? was marked as the answer