Looks to me like you have rust in your gas tank and are running lean.
Usually that orange/red shit means you have rusty sludge gas.
That discoloration at the base of the prongs looks like the bluing, blueing? you get when you heat up metal with a torch or something.
I would say its too hot because its too lean.
I like the plug though. Might get one to try it out and see if it helps a little.
Kind of goofy they wouldn't use a regular plug tool though. Thats like in between weed wacker and normal sized plugs. Thats just different for the sake of different I would have to say.