I'm kind of restating from a comment I already made above, but I think that its very wrong to state that a 50% finders fee is very high.
From my personal experience with consulting (particularly Facebook app consulting) I found that week-to-week I consistently spent more than 50% of my time getting from potential leads to actual sale and spec'd product than I ever did actually developing.
From my personal experience with consulting (particularly Facebook app consulting) I found that week-to-week I consistently spent more than 50% of my time getting from potential leads to actual sale and spec'd product than I ever did actually developing.