When I did my challenge earlier this year, there was nothing in the enrollment e-mail from Delta about Choice benefits, but the website was clear that I would not get the Choice benefits until I finished the challenge successfully. I frankly forgot all about the Choice benefits until recently.

I completed my challenge in August or September and have since qualified for PLT via the "normal" route as well (over 75K MQM + AMEX waiver). I have two sets of choice benefits in my account waiting to be chosen. Choice Benefits 2016 (I presume from the successful challenge) and Choice Benefits 2017 (I presume from qualifying via "normal" methods). Was not expecting that.