You get 5 LBRY for each person you refer. And at one point I think you earned 5 LBRY for signing up (This may have have changed). This is a sign up for early access and you will not receive coins until the program begins sometime in April. LBRY is a respected team, project and has a very large market cap. This isn't a scam.
From the website upon entering email...
"Get LBRY
You're In!
You'll be sent an invite when LBRY early access begins.
And remember, friends don't let other friends miss out on content freedom.
Share and Earn
Earn 5.0 LBC for each user who joins via this URL:"