You should actually implement MotD triggering code rather than using chat fuckery.
Instead of
PHP Code:
FakeClientCommand (client, "say /motd");
use
PHP Code:
ShowMOTDPanel(client, "Message Of The Day", "motd", MOTDPANEL_TYPE_INDEX);
All "say /motd" does is issue the "motd" sourcemod command which is part of basetriggers.