Publishing low quality assets outside Adobe

It’s perfectly OK to self-promote on social media & Adobe Portfolio.

FB owns everything you post on their platform. Read their Terms of Use. 

There’s nothing to stop people from using FB images without your permission.

Are you comfortable with that?

That’s perfectly fine. How effective it is, is questionable, depending on who your social media followers are and if they’re interested in buying stock. Most buyers go directly to Adobe Stock if they are in need of content.

No. You can promote your Adobe portfolio however you wish to but it probably doesn’t help to generate sales.

It’s within the rules. But I only link to assets that have sold, so the link automatically takes visitors to the assets in question. I make sold assets public on my personal and business page. I trust my Friends list, so I will post accepted assets but only make them visible to Friends.