i think it is legit. at least it seems like it.
C.A.T has been around for a very long time (since 2014 for ref: https://bitcointalk.org/index.php?topic=507103.0)
i don't have personal experience with the ref payment but it seems unlikely that a legendary member with +44 trust scams you for such a simple thing.
plus you are bringing him customers and payment means continuation of selling the bot.