In infinite wisdom stephen voss answered:

The limit is actually on the sending of information.  Also, energy has
mass so tends to be restricted by the same rules as conventional matter,
with the exception that, in certain cases, the mass is finite at c.
True FTL communication would cause causaility problems as, to some
observers, reception would precede transmission.

In theory... since we have never actually transmitted communication
faster than light speed.

There is some speculation that gossip travels faster.  :-)

Rich