Location, location, location. Like mentioned above, it's hard to find and totally out of the way. Terrible spot to watch the sunset and other than for a very small handful of people, it's not on the way to anywhere in particular. Cool spot. Not 100% certain, but I do not think it was originally installed as a memorial. But, just like everything else, plaques and memorials continue getting mounted to everything that doesn't blow away in a good wind.
Disco ball got too big for its britches and became a liability. Too many strikes against it: 1. It was on socials more often than not 2. Easily accessible for them to remove with little effort 3. Videos of hundreds of cars and people gathered with fireworks, a DJ, and God knows what else... 4. The permanent smudge pot install shortly before it's demise sealed the deal imo... way too much liability in that one.
Redneck swing was a lawsuit waiting to happen in a ridiculously stupid high traffic area, easily accessible area for removal. Teeter-totter was well built but lasted less than a month in an easily accessible area for removal. The Palapa/Shady Eye lasted a couple season but was easily accessible for removal. Sensing a theme?
There's been numerous others that have been pulled out of the dunes, some almost immediately and some after a couple of months or too much social media exposure.
Swingset... not a clue why they let that one stay. I'd bet if someone mounted a permanent smudge pot there like they did disco ball it'd get removed.
Brawley Slide Hotshot memorial... they've never messed with that one and it hasn't become a social media menace to society.
Veterans Flag Pole... that box is an artifact and has been there since ~1947, long before the ISDRA became the ISDRA. The flag pole mounted to it has been flying Old Glory there for 26 years.
