One customer (about 16 years ago) had satellite internet access, but also had a fax modem on the in-house server - WinFax was still in use back then!
Satellite was so crap that I used the 28.8k modem for internet access while I was visiting. They were amazed at the speed and insisted that I set it up for them to use too. Arranged a dial-up provider for them, switched out the modem for a 56k jobbie and set up internet connection sharing.
Customer was delighted.
It also saved them a lot of money on the satellite connection.