Why is Zoho email advertised as free when it's clearly not?

Why is Zoho email advertised as free when it's clearly not?

I signed up to what was advertised as a free email hosting service only to be presented with a 15 day free trial notice.

If your service is not free, please stop advertising it as such. We are a gaming community with zero dollars in our budget as we do not have any funding sources. Being led to sign up to free services which are not free just wasts both my time and yours. I now have to find another provider and redo work I just spent 2 hours on.