I haven’t searched the proper thread about it so I will answer from memory.
Seems like such kind of seatpost are not designed for lateral forces as applied on a uni when it hits the ground. For a seatpost costing a couple of hundreds of $, it may be frustrating…
And on top of that, you will need to source a KH rail adaper or a Qu-ax rail saddle + you will have to have somewhere to put the adjustment throttle (so either under the saddle on a brake mount or on a handlebar).
I don’t really know if somebody really tested one or if it was educated guesses. It will still be a decent budget for a paperweight (if it ends up broken…).