The Shueisha incident that happened today is a good opportunity to remind you that most animators and illustrators do not own the necessary rights to share, publish or promote their own work on certain IPs. https://twitter.com/fenyo_n/status/1347426672136527873

This rings true especially on big IPs over which right holders are very protective about, like big Shueisha, Toei or Nintendo IPs.
There have been instances of Toei forbidding animators to promote their work on SNS through illustrations.

Today's events come off as unsurprising in such an infrastructure where artists hold no rights over their own work and where big corporations abuse of copyright laws.

To the same extent, it is to be noted that Doujinshi culture (amateur comics, often parodies of existing works) is technically illegal. It is tolerated and right holders close their eyes because for now they see an economic benefit from it

On this last subject I strongly recommend reading Eiji Otsuka's 定本物語消費論 (A Theory of Narrative Consumption, 1989) to understand why Doujinshi are a thing despite going against japanese copyright laws

In our interview with animator @Nishiiterumi1 mentioned this.
Artists who accept commission works are frowned upon as it is goes against copyright laws and she specifically talked about Toei's protective stance over their IPs

https://fullfrontal.moe/terumi-nishii/