Went VIP earlier today and it states there is no restrictions on Subtitle downloads yet i got you have hit your 1000 request quota.
Also sometimes have to close the filebot client and reopen it to chose the searched subtitles otherwise selecting download just gives an unresolved error.
A vip member can download 1000 subtitles per 24 hours.
I don't know where you saw that when you became a vip member you had no restrictions on downloads.
See here:
https://www.opensubtitles.org/pt/support#vip
VIP member
Become VIP member and enjoy site without advertisment.
As VIP member you get:
NO advertisment at all - no popunders, no banners, no hidden ads, no subtitles ads - just pure content
Direct download subtitles - no installers, no extensions, no redirections, no offers before downloading subtitles
Higher download limits - 1000 subtitles/24 hours - useful when using programs such as media centers (but no abusing!)
nice logo next to YOUR nickname - in search page, subtitle details, profile, ...
good feeling about donating great project