Thanks. I just looked it up as well. PoS, so they fail:
It is not well-advertised, but in fact there has never been an example of a cryptocur-
rency achieving distributed consensus by proof-of-stake. The prototypical proof-of-stake currency,
Peercoin, depends on developer signatures to determine block validity: that is, its consensus is not
distributed. The same fate has befallen other nominally-PoS currencies such as Blackcoin.
From
https://download.wpsoftware.net/bitcoin/alts.pdfIt even mentions NXT:
In its initial incarnation, NXT was susceptible to a trivial stake-grinding attack (to be described below)
and could not achieve any consensus. Since becoming closed-source while spamming technically-
illiterate claims at popular conferences, it has fallen out of scope of this document.