Last, because we know the USTA does try to avoid making it so players can game the system, it wouldn't make any sense to use the averaged dynamic rating for strikes for the very reason that someone could throw a match to get their rating low so they could win their next match and not get a strike.
What makes you think that people do not do this? THis is my biggest problem with going off of "team wins" rather than individual wins for deciding playoffs- there are too many matches where someone could lose on purpose to manipulate their rating.
It is possible to lose a match and still generate a strike. How would that be possible to do if it went only on the individual match result?