You can't. You are limited to 1 primary account (which will appear at the
end on the tweet as via @account), and you can add 1 alternate account.
That's all.
TweepML.org provides a way for people to follow multiple accounts at once,
but it's not like the Tweet button. People are sent to another
Hey,
The related attribute takes a comma separated list of accounts to recommend
once the user Tweets but will only display a maximum of two. In the FAQ [1]
we explain this is more detail:
The Share Box will show two recommended accounts who the logged in user
doesn’t already follow. By default
