Paying 2 each turn just isnt feasible, although I could imagine a world where sacrificing it could be beneficial, but this is highly unlikely with the powerlevel being where it is
When the deck "goes off," you can sometimes have turns where you're cycling through 15+ cards while doing other shenanigans, which can take a while and isn't fun for the rest of the table
(2022-04-29) If a creature enters the battlefield as a copy of or becomes a copy of a creature whose blitz cost was paid, the copy won't have haste, won't be sacrificed, and its controller won't draw a card when it dies
Well, assuming the canonical death of Ulamog in the story was just its physical manifestation
It's sort of a more refined version of The List, and indeed the Special Guest list seems to have replaced The List altogether as of Bloomburrow
You see, Hand to Hand started with a simple idea