Welcome to Steemit! After 2 weeks on this platform, I would say the important thing to do if you want to keep your readers, is to diversify and you're doing it! I have been analyzing the use of Facebook vs. Medium vs. Twitter vs. Steemit and what I can say is that they group different types of public. Some may follow you on all platforms or not, depending of the reason they actually follow you. On Facebook, I think the main idea will be grabbing our friends and family attention only, maybe a bit more public, but less with the latest news. Medium on the other hand, is a place where people go to for quality content under the topics of their interest, so you'll see, here on Steemit unfortunately quality content is not always well rewarded but it is still the long-term intention. Twitter is THE news feed of the people you choose to follow, so I believe it goes hand in hand with Medium and Steemit profiles that have a Twitter account, no competition there I would say. So anyways, I am glad to see authors like you join Steemit, may it help improve quality content!!!