Remove the transcranial stimulation helmet. Problem solved. Or at any rate, if it continues, then it's something other than the remote control technology described in the article. Sensations like this can be caused by all sorts of neurological problems, and you should talk to your doctor urgently.
I'm making up figures here, but the answer is going to be something along the lines of:- Because Google has somewhere between one and ten thousand times as many servers as Github, distributed across somewhere between twenty and sixty times as many distinct geographic locations.
I've come up with a better compression scheme than yours. My scheme is exactly the same as yours, but you replace the first three bytes with one byte instead of two. Doesn't matter what byte you replace them with, because - just like your scheme - you can't get the original data back by decompressing it anyway.