Re: First Quantum Link... then Usenet... now...
@dajames; "The only per-hour costs were [..the..] local-rate number. [..] Compuserve itself charged £6-7 a month".
Yes, but *when* was that? I'm going to assume it was circa the late 90s or later. As I noted in another comment, Compuserve's prices fell massively around that time.
By that point they'd already have been past their peak as people moved en masse to regular Internet access. As far as I'm aware, in their 80s and early 90s heyday, they were considerably more expensive.
Apparently Compuserve launched in the UK in the late 1980s, and I'd be interested to find out how much they cost back then.