Can Facebook send bottom send dynamic massage?
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I would like to allow my users to invite their friend through Facebook private message to earn some rewards. I am wondering if it is possible to do it using the facebook send buttom. Sadly I found that the send button can only send a static url (such as www.website.com). However, I like the url to append different arguments from person to person (such as www.website.com/invite.php?token=tk12345). Thank you for any solution and advice!

Welcome any solution apart from send button.