I think the concept is great. I had a provider cancel on me. I had rushed from work back to the hotel to shower, get the room ready. Candles, music, etc. After all was ready, I checked my phone to see a text that she had to cancel.
I didn't try to find a replacement, because I thought it would be disrespectful to have waited to the last minute to schedule. So I went to dinner alone. (okay, tmi)
It would have been nice to look on eccie to see if another lady was available. The hobbiest could post a reply to the "now available" ad, saying "taken" as soon as the arrangement was made.