We don't set limitation on how many websites you want to host on your account.
A little caveat though, if you want to host high traffic websites with 100k/visitors per day then this is might not for you, we suggest to find a Dedicated Server.
Concerns about TRAFFIC spikes?
No worries, 1 of our clients WP sites gone viral with 400+ active visitors at once and the server handles the traffic without any stress.
And as the name says: Cloud4WP.
So we only allow websites that are built using WordPress (see our AUP here).