How to grow a Chrome extension and use it to promote your SaaS?

Anyone here has experience growing a Chrome extension and using it to promote your SaaS?

I built Internal Link Builder. It helps SEOs find relevant internal linking opportunities.
Launched it 1.5 months ago and got 29 five-star ratings from 92 users: insane ratio. Clearly valuable, but growth is still slow.

You can try it here: Internal LInk Builder

Curious to hear your thoughts or similar experiences.