Acceptence Rate

Your goal should be 50% acceptance or higher.   Ultimately, it comes down to how many sales you make.  Higher acceptance rate doesn't guarantee sales but it usually means that Adobe thinks it has the potential to sell. 

Check every quadrant of each image at 100-300% magnification. 

Correct errors if you can in Photoshop or Lightroom.  Or remove from your submission stack.

Rinse & repeat.

Compare 5-10 of your very best assets with current Stock inventory.

• Is yours as good or better than what Stock has? 
• Would you buy it?
• What would you use it for commercially?

If you answer, "I don't know" to any of those questions, don't submit it.

That should help reduce your rejection rate.

Good luck.

If you are a beginner, there should be no problem. As there is no official acceptance rate needed, Adobe once had in their requirements for getting a bonus having an acceptance rate of 50%. My personal view on this is that your acceptance rate should tend to 100%, If you contribute and earn only refusals, you do something wrong and you need to address that.

The assumption here is that you should strive to maintain an acceptance rate of >50%. Any lower than that and you're costing Adobe too much to moderate your images, and you're probably submitting too many similars and poor quality assets. Spamming the database with an excessive number of similars and poor quality assets can definitely get your account suspended. As @RALPH_L  mentioned, if you're getting a high proportion of rejects, you're also wasting your time since it takes time to create, upload, title, keyword and submit images. Concentrate or quality rather than quantity. 

If you have a low acceptance rate you are doing something wrong. It is a better use of your time to create high quality assets that get accepted.

As best we can tell, one should maintain a minimum acceptance rate of 50%. If one falls below that for a given amount of time, I suppose it could result in losing one's account, as the contributor is creating additional work for moderators without generating income. Of course, if the 50% that were accepted are selling well, that might change things. So there's really no way to know how Adobe treats the issue.

A high acceptance rate on Adobe Stock can be beneficial for contributors, as it ensures better royalties and greater visibility with creatives.