Ah, so BTS marketers were just trying to catch noobs who didn't understand that what they were investing in was available everywhere within crypto, rather than being a unique USP to BTS?
The inability to be seized is common among crypto. The ability to remain at $1 per bitUSD is not, only Nubits has the same functionality, with some differences in methods.
... and (as I know) CoinoUSD, but Nubits and CoinoUSD it's IOU's.