Red Hat Developer subscription or not?

Hi everyone, I searched everywhere but I didn't understand how to properly use or not the subscription in question.
I have installed Red Hat Enterprise Linux 8 workstations on my personal laptop.
I have two active subscriptions: a normal 30-day trial and one for developer, this lasts for a year.
After a short time I removed Red Hat 8 to try Fedora 30.
What I wanted to understand and which for now is not very clear to me are the following concepts: is it necessary to have a paid subscription for a personal and correct use of Red Hat 8 or can I use the developer one? If it is correct to use the latter, will my system receive system updates,system upgrades, package updates, security patches, etc. in the same way as a paid subscription?
And finally, if I wanted to reinstall Red Hat 8 how do I connect the right subscription of the two at the time of installation?

Thanks to all.