Originally Posted by
Pulse_
or maybe mylaps just wants to confuse everybody and sell their old stock of non-hybrid transponders

Confusion is the name of the game here...
MyLaps currently has the older 'Hybrid' RC4, and the new RC4 that will only work with RC4 firmware/decoders.
The latest going around is the Hybrid that works on any system, will be discontinued, forcing people to buy the new RC4 at some point, which in turn forces clubs to upgrade to a RC4 decoder at some point.
It's a nice little circle of MyLaps forcing a few things, while not really telling anyone what is going on.