These tend to be the safest alternate win conditions, as they dont draw as much attention as the likes of Approach of the Second Sun, and they still reward you to a degree for just playing the game
A 3/4 body for three mana that offers hand fixing, a lot of the time, will be strong enough in focused strategies, especially ones that care about the graveyard
The Iconoclast has seen some play in or spellslinger decks, and the fact that it makes artifact tokens gives players more flexibility in deckbuilding, combining these tokens with Urza, Prince of Kroog or mechanics like affinity and improvise
The possibilities are endless
That said, it is very powerful, especially in a meta where your opponents regularly play cards like Rhystic Study or other ways to keep topped up on cards