How are you planing to reach to countries like China and Russia where they are mainly using their own social platforms and even Facebook is not as popular like in the rest of the world?
They shouldnt try to reach those countries at this early stage.
If even facebook isnt popular in those countries, i think it will also be difficult for sphere except they have a deal partnership for it.
Not to mention that China will just block them if they get too big. Thats what they do with Facebook and Google. They need to have control over whatever social media Chinese people use.
I think they have and opportunity to enter in those markets thanks to crypto but I wouldn't start with them.
in Russia the most popular social network: vk , I don't think that it can be move to second place in this region. Although one does not need to strive to embrace everything - with time, people will understand the advantages of decentralization.
In the end, this is about the marketing competition.
Im pretty sure there will be many decentralized social media later.
And i hope sphere will really have some unique features in the future.