Granted, the "nickel and diming" of hotline numbers (1900, 0900, etc) was nowhere as bad as today's cash shops, but a lot of us simply forgot they were always hungry for all our money
Here's a bunch other hotline ads for you to peruse - https://www.retromags.com/gallery/category/1729-telephone-hotlines/
PS: I never understood these american numbers that used letters, how were you supposed to know what was the actual number?
After reading your comment I had to do more searching and I guess they did actually use it in America... For the bike that I never saw in person, made by Life Fitness.
Edit to add: Now I wonder if I'll ever find one now that I'm looking