The kAmp is part of the surge protection rating. He is talking about the line amps. I'm not an expert of surge protectors but I believe what this means technically is... The surge protector can handle up to 10A / 2300W running through it on normal use (the mining rig can pull that much, need to follow the 80% rule though). The surge protector can survive a 13kAmps surge (that I am not sure about). There are a lot of really smart people here. I'm sure someone will clarify, but I do know we are talking about two different things.

Also - Surge protectors don't live forever. They might "function" but they can lose their ability to protect.