I think the comment was about the need to file for FCC for some strange hat on top of RPi4. But I guess you have to if you want to sell it in any sort of quantity.
The site itself is pointless, all that info is published on the FCC site anyway. There is no new intel gathered here.
And FCC allows for a non-disclosure period, you just have to request it along with the filing. So if FCC leaks stuff for you, you only have yourself to blame.