While the offer/program might not be worth going out of its way, you should though definitely consider it if you plan to fly with Emirates or Flydubai anyway until June 30: Booking your flights by April 18 (and registering for the offer) lets you earn double miles on almost all flights in their Skywards program. Only flights to/from India are excluded, whereby it is not clear how a flight such as New York-Dubai-India is handled, i.e. whether you’d still earn double miles at least on the New York segment.

But as always if an offer is not fully clear, you should better not take a risk of being disappointed in the end.