What's up with the Adopt R Us spam? Is that something that happens regularly?

Yeah I'm not really sure. As mentioned here: Sudden massive amount of pets in shelter? they seem like pet names that serve as placement names when a name gets swapped from an inactive account. But I'm not sure why they're all in the adoption center now.

Inactive names turn into name_###, so that's what was confusing.

Thanks for clearing that up!