...
So wetsuit, what happens in instances like this? Is the original 77BTC just lost in Bitcoin space? Did it become permanently orphaned? Is that a cost that you have to eat?

Nah. If tx was never broadcasted the first time around, bitcoins have never left the wallet, so nothing is lost.
Still kudos to wetsuit for paying that extra
BTC1 and for not running away with that
BTC77

But can't figure out how could someone accumulate that much. Probably either lucky gambler or just used freebitcoin as an online wallet.