Please don’t downvote me to oblivion

I’m looking into buying some 3rd party game Currency for a game called Warframe and the prices are looking really good and the method is somewhat questionable
How bad of an idea is this
The 3rd party is G2A😬 and they’ve got some pretty high seller ratings and reviews
But ey man the reviews are good but they also have some downvotes.
What’s the biggest risks here and how common are those risks. Could I bounce back from those?