In the digital world, there are only two kinds of providers: content providers and access or platform providers. Some content providers are writers like you; platform providers are like Medium and, as long as the traffic is robust, they do just fine. You have now found content to provide that has greater value to your readers than the posts that you previously delivered. That's fantastic. Not everyone can consistently deliver posts that have value to large numbers of readers. Niche and market; niche and market. It's the path that we are all traveling.