Mailbombing, spam and unsolicited bulk email is strictly forbidden on our service.
Registered users are just rows in a database, we don’t limit those specifically. However, there is a limit to the number of active users who can visit your website in a day. How many visitors that is highly depends on your website and how your users behave on it.
We don’t accept donations at the moment. If you have some money to spare and would like to support us, please consider buying a hosting account or domain name on XVHOST.com. That helps us a lot too.