Do any of you actually use Grammarly?

I use it as a plugin and on their website

Yes, all the time. It really helped me to improve my writing.

I use their extension for pretty much anything I write. For longer form copy, such as blog posts, I use their MacOS app. Clarifying since I could only select one option, obviously :)

I use it very regularly, and I primarily use it through their chrome extension.

I use it as a Grammarly Website Editor daily because I have to write a significant amount of text and cannot pay attention to all the peculiarities. It’s an extremely useful tool because it helps to find all the most common mistakes.
I like such grammar resources for the possibility of writing better texts and maintaining a certain speed. It is especially important when your salary depends on how much text you write daily.
So, people who work with text professionally or just like to write would appreciate grammar tools as something that helps them correctly communicate their thoughts.