20+ years ago I was offered a free 2 or 3 month subscription to compuserve. I was interested in it, as one could dial in as PPP account for internet access. S

20+ years ago I was offered a free 2 or 3 month subscription to compuserve. I was interested in it, as one could dial in as PPP account for internet access. So I configured my linux box to dial in and if the connection dropped, to redial. After the 2nd month I get a huge multi hundred dollar bill. They claimed over the the 2 months I had used 2k-3k hours of time an their free months were limited to 750 hours a month of usage. As I pointed out, that should be enough, as 24*31 = 744, so it should be impossible for me to use more than 750 hours a month. They claimed that I must have been dialing in from multiple locations. I denied that and said they should have records of where I was calling in from. It took weeks for them to "forgive" the debt, without acknowledging that their billing was broken. I always wondered how many other users got hurt because of this (my guess is not that many, as relatively few people were keeping their connection alive 24/7 via compuserve back in the 90s)