In this area, we have no "CO-OPs", and our utility co's do not install meter pans and service 'drops'
Looking at the link you provided, this is a "utility owned service, to the load side of the meter"
One utility here (PSE&G) supplies meter pans (100/200 etc) to the EC/HO upon submittal of the original Twp permit. Everything else is supplied by the EC/HO.
I guess that the CO-OP installs the service to the line side of the meter, and the EC continues??? The grounding issue in your post would have to be installed with the 'load' side equipment.
We also are not usually allowed to install ANYTHING on a utility owned pole, except riser conduit for 10' above grade, and conductors to reach the utility lines/transformer.
BTW, the $$ sounds dirt cheap. Our POCO's have high costs for work required to provide service thanks to de-regulation.