Oh, yeah, if local calls weren't free, BBS's would have never taken off the way they did. It was a thrill being part of a network where each BBS would make a nightly call to the furthest still-local BBS, which would then repeat the process... You could reach all the way across the country and back in a few days, for free! It felt like you were getting away with something. Exciting times.
But the online services were really freaking pricey.
Here's a price list of online services from the 80s.
Compuserve was $11 an hour.
https://imgur.com/a/zdoZj
http://i53.tinypic.com/2janfrd.jpg
http://www.wholeearth.com/issue-electronic-edition.php?iss=1...