What is a recommended amount of images in one batch ?

I upload large batches from my Lightroom Classic Catalog once a month or so. Then I work on a few every day to add titles and keywords and submit small batches of 3-5 daily. In this manner, I spread the workload and am assured of a few images being reviewed/accepted every day. This slow and steady approach has also resulted in a high acceptance rate.

rgar that, thanks for the answers 🙂 ! 

You should not wait for assets to be uploaded and submitted. To the contrary. It will be better to submit each day than to submit 60 assets at one time. There was never a figure given in the FAQ. The rule was always to upload regularly.

I personally feel it is better to submit a few each day. This ensures that images are reviewed on a regular schedule. We have no way of knowing what a reviewer does when he rejects one image with other images in the queue.