On Maker, extra updates can be purchased, just not extra rows.
As far as I understand the plans, all three Free, Maker and Team can leverage spreadsheet data sources only (Google Sheets, Excel, Airtable) and not scalable data sources such as SQL. Regardless of the number of users. So in their very nature, apps on Free, Maker and Team are not meant to truly scale.
The Maker plan is $600 per year (or $6000 per decade) for an app that a community of “unlimited” users can access. If the app can run on 25k rows or less, Maker does give us quite a bit already at a reasonable price.
I would not be surprised if in the future, the 25k limit will be raised, especially on Glide Tables. But this is only speculation on my part.