why is meta-mart "tagging" my property?

So I logged in today and got this message:

"Meta Mart Warehouse( 1 Prim ): Your land Tea Drinker's Union Beach, Bike Track, Biker Village Prog Rock! on Rivuline has been tagged for the first time using metaHUD, you can add pictures to it at http:"

There was no URL but I did track down http://metaversemart.com/

Checked my land and there were no unauthorized objects there. Figuring it's just a robot but seeing as my land is not commercial (there's a few objects I made for sale if you look really hard but nothing advertised or vendored) and it's just a half region I'm using for my creative experiments.

Can anyone explain or take ownership for this 'greeting'?

I see metaHUD I'm guessing it's some sort of digg type thing? If so that's kinda cool I guess, but maybe the verbiage needs some work. It was a bit disconcerting at first look.

http://metaversemart.com/aboutus.php

The about page lists the avatar names associated with metaversemart .

There's an inworld metaversemart group.

There's an email address at the bottom of the metaversemart.com page, info[at]metaversemart.com .