I have always paid on every spycrab. Even without a middleman. For the larger ones, I prefer to use a mm and I tip well too most of the time. I tipped a bills hat after winning 5 buds the other day.

I the reason why I prefer spycrabbing to trading is because the hats don't really mean much to me. It's either crab up to 200 buds and cash out or lose everything. Either way us fine because winning 200 buds is little money and so is losing the items I have.