Meh. I treated that site like every random site that requires a login that I think I'll use once: it got my 20 year old Hotmail address, a randomly generated password, and was accessed solely from my VPN IP.
The only reason I even set up an account was so that one of my Kodi extensions could hook into it.
Open subtitles does require a pw change, it broke mplayer integration.
Funny, though, they got breached approximately an hour after I went VIP - it's the only way to download an entire season of subtitles, and their maint window correlates to me having spotty subtitle coverage across most of my library. So I gave in and gave money.
The only reason I even set up an account was so that one of my Kodi extensions could hook into it.