Chrome Store Extensions

Why is Chrome Store being used for extensions? Is there an alternative?

Hi

Brave is based on Chromium. Opera also uses Chrome Store for extensions. I dont know of any alternative.

Any directions on how to get the extensions, I’m new and getting confused. I thought we used this browser not Chromre. If I get the extension will I get the rewards and go throw Brave still? Any feedback is welcome I trying so hard to learn and I’m a minute from a PhD . For real lol