Barclaycard - retentions £50 credit.

I just tried to cancel my zero balance Barclaycard, all going well, had to listen to the retentions blurb and kept saying I wasn't interested.

Up to the point where they instantly credited my card with £50.
Which I can transfer out immediately.
And there's no tie in period afterwards.

Interesting times that they can give away free money in the vain hope that I will spend spend spend on it.