New submission limits for Adobe Stock Contributors

I'm just not quite sure why Adobe has come up with a formula for limiting uploads, as opposed to a simple limit of, say, 100/month. 

That is not possible at the moment. According to Adobe Stock, it depends on various factors. So the best way to deal with it is to upload small batches. Check the image quality before uploading. If you have fewer rejections, you can upload more. I'm following a simple plan of 4-5 images/vector files per day. 

When you reach it. It's different for everyone, based on a variety of factors.

Have you encountered the limit already? How many do you have under review? The limit is established by a formula that measures sales and acceptance rates, so it appears the submission limits will be different on each account.

I don't expect to ever encounter the submission limit on my account since I submit only a handful of images at any one time. I probably haven't submitted more than 50 a week in a very long time. If you concentrate on quality instead of quantity and supply unique images, your acceptance rate and sales will start to grow. Adobe prefers a "slow and steady" approach to submissions, not large batches, and that's what they're enforcing with this new change.

You will learn it by observing the activity on your account. I never submit large batches, only a handful of images daily, so I don't expect to ever encounter my limit as I am more interested in quality rather than quantity.

Read the print screen that I posted above. It's a weekly limit, and once you've exceeded that limit you can't post more until the new week starts. I don't think we know yet when the week starts, so you should keep checking back every day to figure that out.

Adobe has not stated that, as it varies by account. 

No, but stop submitting bad quality assets. I strongly suppose that this is a moving target. So the more you increase your acceptance rate, the more assets you can submit. The same with sales. The more you sell, the more you can submit.