OK,
So it sounds like some sort of bribe. We don't use that term here, hence the question.
When someone paid the Clinton Foundation, what was the play?
Is the play component revealed in the FBI email leaks?
If she is elected President, can she be impeached for any illegal activity stemming from these FBI investigations?
In all seriousness, the "Play" aspect is supposed to be special favors or privileges granted to those who donate. This hasn't happened to anyone's knowledge, and in fact in the case which may have seemed most suspicious (Morocco), HRC went out of the way to avoid P4P (refusing to give the speech for CGI), which is of course the proper course of action. Right-wingers, of course, will whine about her "cronies" in Haiti and Africa, without actually having any source for their claims.