A referral link would be preferable to a referral email.

[christophernies]

A referral link would be an awesome way to share wsend, as opposed to the "enter the user's email" system that you currently have in place.

Just spitballing here, but perhaps you could offer this to paid accounts only? Since referral links are a tool for getting referral rewards (extra space), offering referral links to people who meet the paid requirement might be a good carrot to get more people to buy in.

[abemassry]

That's a good idea, I'll start working on it.

[abemassry]

added a command line option --refer-link it outputs a referral link you can send to people and share to get more space and refer others to the service