I went through the list. P stands for Puppet. A lot of those names are on the NEM stakeholder list and several own more than 3.
vonBerlichingen, Ziustag, BierKoch, TheGreatWodan, Manowar are listed as P3 on the Node stakeholder list and had their stakes removed, but they're still present on the NEM stakeholder list. That's presumably one guy with five stakes and he hasn't claimed any tokens for them yet.
waltz, ney, rockhill, beida, BitTom, shenjie are P18 and I know a couple of those names were on the NEM stakeholder list. I find it strange Beida would get a refund from NEM months ago (yet made a post today about NEM
) but keep a stake with the Ney, Waltz and Rockhill account. He claimed those tokens; so he may have sold them already.
That's only just from briefly scanning the node stakeholder list - a lot more of their busted socks are probably on the NEM stakeholder list but you'ld have to go from P1 to P20 and search for them in the NEM list.
How they found these socks I don't know. They made a post on it. They did taint analysis like NEM but also went through other factors. They may had collected IPs from the NXTL account generator and cross compared them. Alternatively, they could just be grouping inactive newbies with similar names which really isn't busting socks but busting inactives with username similarities.