You will receive 40 XLB tokens.
Go to this StellarPay Airdrop form.
Follow StellarPay on Twitter.
Retweet their pinned tweet with #XLB hashtag and tag 5 of your friends. (+20 XLB)
Like StellarPay Facebook page.
Share, comment and tag your 5 friends to this post. (+20 XLB)
Now, Create a trustline to your Stellar wallet with XLB (see the steps here).
You will receive 40 XLB tokens.