Without question one of the best green artifacts and best creaturefall cards, The Great Henge is money in any green deck with enough stompers to get it out quickly
That variance can be immensely enjoyable, and my results at Pro Tours demonstrate that Singleton decks can hold their own in 60-card formats with expansive card pools
however, the key difference is that the Toy Workshop says you can only spend this mana to cast spells or activate abilities that put tokens on the battlefield
They are featured in other types of builds and brews, where they can simply be considered ordinary cards, albeit limited to their respective oil counter trigger conditions and turn restrictions
The resale premium often more than covers the additional expense
While I think it is technically optimal since it's basically a free roll, we didn't play against counterspell decks at all