If their goal is simply to get people's attention, it worked.
But if they're out to actually sell the coins......not so much.
Would anyone here ever even take a chance on buying a coin with only an image like that to go on? (Forget about return policies.)
Judging by how the other photos were taken, I think this was precisely the intention.
The Vespasian denarius stands out in a sea of silver denarii.
It only cost them one slot in their inventory.
Beyond customers clicking on it to satisfy their curiosity, I question how effective this could be as a strategy. Odd photos could turn someone off from buying, especially in a hobby where everyone is conditioned to pay particular attention to anything which is strange!