Subjectve experiences with Rejection of Similarity

The serpent is eating its own tail.  

Firefly was trained on source material from Adobe Stock. Therefor, Firefly output is a mashed up version of what Stock already has. You'll need to go above & beyond Firefly to create commercial quality assets that Stock can sell. 

Mix things up. Use AI as a starting point instead of a final product. Combine with AI from other services or original artwork of your own. 

Before you submit, compare your subject with Stock inventory.  If they already have millions & millions of similar subjects, don't submit. Find something else that has less representation.

Hope that helps. 

Adobe does not read posts in this forum, so you will receive no response here.

To address 2 of your points, the 33% royalty should not be a surprise to you. You can access the royalty structure by clicking on the Royalties link at the bottom of your Contributor page. Many Contributors submit their work to numerous other stock providers and most have said that Adobe is the most lucrative.

Regarding managing the volume of AI uploads, Adobe has taken several steps so far this year to staunch the flow of duplicate and similar images. They developed tools a few months to remove duplicates from individual accounts. That results in a few million deletions from the database. More recently they developed an algorithm to identify "similars" and refuse assets which are too similar to existing assets in the database, both on your own page and across the database. While many Contributors have argued that this has resulted in some unwarranted rejections, there is no doubt that there are masses of similar images on almost any topic you might want to search on. 

Nevertheless AI assets now constitute 45% of the Adobe Stock Inventory. For most of last year they were adding new AI assets at a rate of nearly one million per day. In the last ~12 weeks that has slowed down to ~550,000 per day - still a substantial number.

Your challenge as an AI Contributor is to find underserved niches and create truly unique assets - not an easy assignment considering the vast competition.

...........but having in mind that a single creator receives 33% whereas a company who gets participated in every single sale of million of contributors gets 2 times more it made us both a bit surprised as well...

If the participants share in the endless costs of the company (staff, rent, taxes, withholding, stationery, cleaning, servers, programmers, accounting, electricity, water, heating-cooling, malfunctions, renovation-repair, lawyers-legal professionals, licenses, subscriptions, many other different operating expenses, the principle of deducting the interest income of the capital invested in the business from the net profit, etc. etc.) what you say is true: 33% is a small percentage. But the participants only share in the profit.

You are right about the rejections due to similarity, it was also discouraging for me.