Thanks very much, SyRenity, I've PMed you.
The concern re: /r/xcp and /r/counterparty is not that their moderators may be Mastercoin investors, but that their statuses within Mastercoin (ProphetX as an employee and r00tdem0n and mavensbot as /r/mastercoin moderators) suggests very strongly that their position as moderators on Counterparty subreddits poses a serious conflict of interest, especially since, as far as I know, r00tdem0n and mavensbot have not been active participants on this bitcointalk thread.
Could you talk to them to ask them for taking over these two groups or you have tried but they refused?
I have not yet contacted them. Unless I am mistaken, since they registered the subreddits, they will always be moderators, and hence the conflict of interest cannot be completely removed.
Going forward, the best thing to do is be very active on
the subreddit registered by the Counterparty team, to, at least minimize the ambiguity as to which subreddit is "the Counterparty subreddit".