I believe that if you uninstall any module, you will lose user data.

Additionally, I think the modules on GitHub are not as up-to-date as those in UNA CMS. The reason why the modules are kept up-to-date in UNA CMS and require payment is simple: every developer deserves to be compensated for their time. After all, they have families to support, bills to pay, and other responsibilities like school fees, etc.

Maintaining open-source projects on GitHub is, in most cases, a matter of goodwill and the developers' own choice. Open-source projects are usually provided for free, with developers offering them to the community without expecting direct financial compensation.

However, I might be wrong, so it’s best to wait for one of the UNA team members to give you a more accurate answer.