This sort of thing is noticeably absent from Path of Exile, which offers things like special animations, dances, pet companions, and even the chance to create unique items that will appear in the game from the store shop.

FORBES: Path of Exile: A Truly Free-To-Play ARPG

The group "would have wanted to have the Pet Rock labeled with a warning that it might create blunt trauma if tossed with sufficient velocity at another, " Klein says.

FORBES: Magazine Article

The president of Pet Lovers Unite dating agency writes that he was inspired to create the service when his two "family members and best friends", Zorro and Samantha the cats, passed away.

BBC: News | UK | Lonely pets seek love on the net