Greetings from pixiv.

pixiv's Guidelines were revised on September 16, 2020.
Guidelines
https://www.pixiv.net/terms/?page=guideline

■ Main revisions:
・A notation about profile pictures was added to "About age restriction, removal of works"
・Added the "R-18G" notation in "Age restricted works".
・"Adding tags that are unrelated to the content of a work" and "Posting comments for the purpose of inappropriate advertising or solicitation" were added to "Prohibited conduct"
・"Reference materials" were added to the details of "Images and text"

Thank you for your patronage with pixiv.