Many moons ago I used ic24 dial up. If I remember rightly the disks came from an Esso petrol station. The Birmingham Post & Mail newspaper site (part of Mirror Trinity) is powered by ic24 and has been for years, click here
They seem to have come back to life again I fairly recently received a sign up cd through the mail so they must have a list of those who used the completely free service years ago. I did not try it so I cant comment.