Roadmap:what are you going to do?

Hi! I own a webdesign agency and thinking about switching all of our clients websites from Yoast to Rank Math. I have some doubts about your future, since the plugin is now free i’m afraid it will become a premium plugin at some point.
It seems too good to be true 🙂 the plugin is almost perfect and offers so much for free! Will it stay free forever with the fetures it has now? Will you add more functions on a premium version on the future?
I’m willing to pay for the plugin, but i can’t charge my clients suddenly, i will install it for free and i can’t tell them they need to pay at some point to continue using the plugin.
I hope you understand that my request is not an attack or a complaint, it is just a simple enquiry. I love Rank Math!
Thank you!