I’m looking for a single word to capture this attitude, perhaps an entirely new word:

I really appreciate that you’re doing important task for me without any compensation. I don’t know anyone else capable of doing it at all, and it’s miraculous that you are doing it at all, and doing it this quickly, but could you please do even faster? And could you do it more often? But thank you so very much!

Bald Machiavellian compliments, just enough compliments and pleasantries to keep the volunteer going . . .