This is technical pedantry which just might mislead someone at a council wondering about FMS, perhaps?
"We sell FixMyStreet for councils to install on their own websites"
It's the word "install" there which bothers me. That makes this sound like something they have to install, and actually even with integration that's not really the case. I suggest:
"We sell FixMyStreet for councils to run on their own websites"
This is technical pedantry which just might mislead someone at a council wondering about FMS, perhaps?
"We sell FixMyStreet for councils to install on their own websites"
It's the word "install" there which bothers me. That makes this sound like something they have to install, and actually even with integration that's not really the case. I suggest:
"We sell FixMyStreet for councils to run on their own websites"
https://github.com/mysociety/annual-report/blob/master/commercial.html#L16