Not sure what you mean by Enterprise plan here. All Enterprise pricing and limits are negotiable through Sales, so there isn’t necessarily hard limits that are listed. Are you talking about the Business plan?
Can you clarify which plan you are talking about? Only the current Maker plan allows for unlimited users, but only Personal users.
To add to @Joe_Gabriele’s response, this is only on new plans. Legacy plans still count updates regardless. It’s on any of the new plans where updates are not counted against Glide Tables. Not just Business or Enterprise plans.
The key part is the data source you are using. With the new plans, changes to data in Glide Tables do not count updates. USC columns are still data stored on the server, so the same should hold true. Where I’m not completely sure is if USC columns in external data sources count updates or not. Still waiting for clarification from @NoCodeAndy on that. User specific columns and airtable sync updates? - #4 by NoCodeAndy