Nah. The risk greatly outweighs the reward.
Does it? Standard dark web precautions are more than enough to throw any investigation into a dead end, especially for a one-off transaction with the buyer having little to no other activity.
The fediverse is simply not really ready to compete with established actors.
Yet. The Fediverse isn't ready to compete yet. Business people aren't looking purely at the present, they've got a keen eye on the foreseeable future too. If there is a growing momentum towards the fediverse, that can spell trouble for Reddit in 5 years time. The entire point of such an attack is to derail momentum on the platforms. By the time they are ready to compete, it's much too late for this kind of attack to have any reasonable effect.