That's not true, in fact Voodoo Labs staff frequently state you can plug in a power strip into the courtesy outlet, so that you can connect even more individual adapters. If you check the manual, there is a warning to not plug in your amp, that's all. Basically don't plug in anything ridiculous, but the courtesy outlet can easily handle a few more pedals.I heard courtesy outlets drains nearly all the current from the power supply leaving little current in the supply itself...