GitLens is great, if you like it use it. When I use VS Code I do, but VS Code is not the only tool I use in my work. You are free to your opinion of course, I am just not a fan of statements like "X is better than Y because Y costs money" with no evidence, as if it were obvious.

The GitLens website asks for monetary support and sponsorship front and center. If that's the way you prefer, that is perfectly OK. That doesn't automatically make it a better product.