There are limitations on the number of views/prints etc. if I remember the licensing terms, but not on the number of uses (for the same customer).
Licensing is basically limited to one customer (you're doing work for a customer, license the item. Second customer, same item: relicense). Own use counts for a customer (you need to relicense the asset for your own use, if it has been used for a customer).
For video there are "broadcast" limitations.
See the licensing terms for more info:
Look here for more information on licensing: https://community.adobe.com/t5/stock/links-for-licensing-terms/td-p/11366788 (Disclaimer: As always with licensing, this is my interpretation of the rules. I think they are correct and advice is based reading and interpreting the license terms and on fair use for both the buyer and the artist/stock company, but I can not rule out that my interpretation is wrong. I'm not an Adobe employee)
Regards, Abambo Hard- and Software Engineer and Photographer.