Also, the dev claims that, I quote:

>https://bitcointalk.org/index.php?topic=1396233.msg14526431#msg14526431 (mirror)
>No membership or registration is required. Your XEL are simply credited to the public key of the first input in your bitcoin transaction. If you do not understand the instructions on the website entirely, you might want to wait for the howto videos.

But the coin is not build on the top of bitcoin.

Later the other dev (EK) explains the redemption process:
https://bitcointalk.org/index.php?topic=1396233.msg14526549#msg14526549 (https://archive.is/wGUOL#selection-1673.0-1682.1)
https://bitcointalk.org/index.php?topic=1396233.msg14526785#msg14526785 (https://archive.is/wGUOL#selection-2645.0-2649.89)

Which is meaningless and actually cannot be done.