Clearly, Wizards is taking advantage of this fact already, with a number of new Avatar cards making use of Exhaust
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Progenitor Mimic - This one is cheating a little because it's more a clone than a token generator on ETB, but by flickering, you can routinely change up what kinds of tokens you're making, which is always a big help
I might be around on there testing with pickup groups if you all are there after the weekend
Throw in a Seedborn Muse and your opponents will fall for this Boros cards charms
These machines can be bolted to a countertop or mounted to a vending rack so you can put a few small machines along with it and offer other items, too