words of advice for anyone that post at Pixiv and dont fall into the same mistake I did:
Don't put links/URLs to external sites, specially if you're advertising paid content such as Fanbox
(months ago Pixiv detached the feature of showcasing your Fanbox at your Pixiv home page, so mentioning or adding links to them would get you in troubles)
As for me:
I had to remove every description on all my Pixiv posts, so don't expect me doing so again from now on just to be safe (even here)
This whole inconvenience delayed the schedule but finally I can resume my normal posting!
also yes, I never got an explanation in the first place, I had to:
-fill an inquiry
-wait 4 days for a reply
-do what they say
-wait another 3-4 days
-success