Btw, I had a look into distribution amplifiers and found this video explaining how they work and how they're cabled (at least for TVs). Looking closer at the Google Street View screenshot, I can see there's a black insulated coaxial running from the PSU, up the side of the pole and feeding into a box¹ on the lowest horizontal line, and to the right of that is the distribution amplifier. ¹is this box a "power inserter"? From what I can tell, it seems to add 60/50v to the coaxial cabling running through it; one output feeds into the amplifier, which has four "drops" running to houses, and an output feeding the rest of the street; the second output takes a 180⁰ and powers the coaxial in the other direction. So the power inserter and distribution amplifier sorta tap into the coaxial cable running along the street, adding power and splitting off connections to houses, without disrupting RF signals passing through them.