I had never even heard of 9Gag before until now. It definitely looks like this decade's iteration of eBaum's World, except instead of "borrowing" Flash games from their original creators, it's skimming images from Reddit.
Borrowing is a such a weak word for stamping their obnoxious logo on unoriginal pics. Its somewhat saddening to me how popular they have become due to their sleaze. (Seriously: Why create anything new when you can rise to popularity on the works of others?)
That was exactly what I thought. While not constructive, my first urge (if I were in the position to respond) would've been a screencap of the email with a 9gag logo stamped on the corner.