In his feedback left to Husna QA, he said that they worked together on some translation projects. Hence, sending coins to each other is reasonable. Besides, forum members are sending coins to each other all the time.
-snip- @op, having multiple accounts is not against forum rules. Unless they are used to join the same bounty campaign, excanging merits or trust farming. Why did you bring this up! Does it have something to do with them being good members and receiving many merits!