Is there a way to earning gold by inviting friends to this site?

Because with most avatar sites (like Mobion) members would invite their friends to join by having them use a invite code to earn gold.... Do they have that kind of system here??

Currently, no. You don't get anything from referring friends over to the site aside from personal satisfaction and having your friends on here with you. ^^

Menewsha rewards you for contributing to their community.
today is their double gold day.
they give you twice as much goldies for each post you make.
so if this post got me five goldies, normally,
it would reward me with ten goldies today!

today is a great day to earn a lot of goldies for chatting up a storm!