I tried again it works for me… Most probably one Credit card can only be used once for a trial (same as other online services). And these CC generators cannot scramble too many cards so sometimes its possible that you get the exact same card that you tried last time.
Yes it is still working as of today. Created an account a minute ago. You could simply try it for yourself before asking and maybe give updates here. Peace!
When I opened that link, I was presented with this and then I clicked on “Read Free For 30 Days”, it redirected me to Scribd homepage and showed a warning message “already purchased”