Removed redundant mailers
Removed last reference to trial account
Some basic protection against bot-registration added ...

The idea is to have a hidden input field that humans will not be able
to see - and hence not be able to fill - but which bots will because
they fill everything

And so, if this field comes filled, then we could say that its a bot
doing the registration and silently ignore it

This is by no means a catch-all, foolproof protection. But its better than nothing