I haven't checked the availability on Extra Holidays however someone in one of the Wyndham Facebook groups did but just for Bonnet Creek. They said that the times on the list were blocked out for availability at Bonnet Creek through Extra Holidays.
I was very surprised that Panama City Beach, Majestic Sun, Emerald Grande, Glacier Canyon and Great Smokies Lodge weren't included for Memorial Day and Independence Day. Whoever drew up the list really needs to be better at their job because those resorts absolutely should have been on that list for those dates too.
I too wondered how in the world Clearwater isn't on that list at all. I continually see owners saying they can't get stays there.
Sandi Bo made essentially the same point -- that the logic behind the list is elusive.
Why not Old Town Alexandria and National Harbor for 4th of July? Both are within shouting distance of the District and a pretty good fireworks show (never mind that the Capitol looks like a war zone).
Skyline Towers for Memorial Day? What's up with that?
Two San Antonio resorts for Independence Day and Labor Day? No Bonnet Creek on Labor Day? What goes on at Park City on Labor Day?
Midtown 45 for Independence Day and the winter holidays but nothing else. No New Orleans resorts for 4th of July (did they call off Essence Festival?)
Either Wyndham has some metrics used to arrive at the list or this is Wyndham flexing its muscles, showing what it can do. Think pro wrestlers entering the ring.
As a bottom feeding, sometime renter, none of these dates/resorts are within the 60-day discount window. And, over the years, I don't think I've done a lot with any of these time periods. We went to National Harbor for Memorial Day 2019 and to Old Town Alexandria for the 4th in 2019. Both are just down the road. I did rent a week at Ocean Walk for the 4th in 2019. I'm usually out of points way before Thanksgiving or Christmas/New Year plus I have some non-Wyndham fixed weeks for those periods.
All in all, I don't see this as anything that will bother me. It's something to pay attention to when booking reservations but not to be upset by. At least not this year.