I wasn't able to attend the Believe! event, but from a marketing perspective, PADI gets it better than the other dive agencies there. They had a huge presence and every person at their booth was on the same message: attract younger divers through Drop Zone, the new IDC focusing on in-store equipment sales more, Boy Scouts of America, etc. They created an Apple store-like experience where things were clean, modern, there were plenty of people to answer questions and they were proactively offering solutions to local instruction and equipment sales businesses.
Love them or hate them, they get the business of diving.