When I first started using FOSS software I was like "It's very cool, but I guess it's not popular because it needs advertisement it does not get with actual ads!"

But recently, I came to realisation, that there is a lot of people advocating for free software, it's just their words do not get response until usability, acessibility, lack of features and a bunch of other problems are fixed.

Advertising FOSS and educating people is also necessarry, but it will not be enough to make a difference.