I worked for the BSA from 04-06. I was raised LDS and almost every man in my huge-cliche-like extended family was involved in scouting for some time.
Even before I worked for them, the BSA was tightening their belts because the LDS Church was getting less involved, refusing to renew property leases, donating less and threatening to pull away completely.
In my 20ish years of scouting, there have always been openly gay scouts and leaders. Occasionally you'd hear of someone being forced to resign, or a scout leaving for being hurt or attacked. Unfortunately there are assholes in every crowd. Overall the Scouts in the program were accepting, no one cared about anyone else's sexual preference...It was a non issue a lot of the time. But what do I know, I'm a Millennial.
The Church however...well it took them until 1978 to start treating black members "equally". Same sex marriage has only been legal in Utah for 4 years, it's going to take them quite a while before there's a revelation from the Lord that The Gays are normal people who can raise functional families.
Women have always been a huge part of Scouting, there are a lot of adult leadership positions available. But girls were never allowed in the program and most high level leadership positions are simply unavailable to women because it quite literally was a boys club. Becoming more inclusive will be great for Scouting and may be what helps save them.
I hope the Scouts survive. I hope they've been preparing enough : )
I may actually look into volunteering with them again now they'll be more separate from the grumpy white men in the LDS Church.