As to OP's question, I always assumed users gave bounty/signature managers absurd amounts of merit as a way of trying to buy their favour or improve their changes of being accepted to the current or future campaigns.
If he/she does this for that very reason, I doubt that'll happen. Seeing as all of his/her posts are just 1 liner
He/she is lucky to have ranked to Legendary rank way before the merit system were introduced and implemented.
BTW, I have already sent private message to the person involved. Still waiting for his/her response tho.