Dear @whatsup
Yes you can subscribe to many communities. With each post though, you have to select 1 to post to.
Thank you for your comment and I'm sorry for such a late reply.
From what I've learned users can chose only one community to which post will be "connected". That will make it really difficult for those who would participate in few communities and will have to chose to focus on posting to one of them.
ps.
May I ask you for little favour? I'm not sure if I did ask you about it already or not (hope I'm not repeating myself).
Could you please check out also my recent post if you have few min and share your thoughts on questions related to concept of "introducing steem blockchain to businesses":
https://steemit.com/steemleo/@crypto.piotr/my-very-first-trip-to-switzerland-one-of-the-most-crypto-and-blockchain-friendly-place-on-the-planet-earth
Your feedback is always appreciated ;) And I will upvote most valuable comment with 100-200k SP coming from project.hope account.
Yours, Piotr