[swarmee]

I see it like this: I read the PSA/CU board, Blowout, and this one. I don't have a problem with him cross-posting. There are partially overlapping memberships on the Venn Diagram for all these sites, and many people are exclusive to a single site. It's rare people will see more than two of the same one.
I have messaged Tanner about items and sent him some Cansecos before, just because I appreciate his passion for the game and cards. If he posted and then ignored all the comments, I could agree with you labeling him a scammer. But if he can keeps up with comments on eight message boards, he has too much free time, however he should be able to as long as the moderators don't have a problem with it. The general feedback I see on his articles is highly favorable.