If you unironically have fallen for the flat earth CIA psyop, there is one easy experiment you can do to prove yourselves wrong.
Step 1: buy GPS enabled go-pro
Step 2: buy high altitude capable balloon
Combine the two, watch the balloon go up, track where it lands, watch the footage for yourself and free yourself from Mockingbird bondage.
For a little extra, you can configure a live feed system and watch everything in real time all under your control! Yes, it really is that simple!!!
I like the old methods almost all of the time. I've never heard of this but it sounds like it will work literally forever and be able to account for any changes in spin speed over that forever time period. In exchange for a chip, likely made in China, that could have and likely will have issues within 50 years like every piece of electronics ever made.