Huh, Visible is at least 7 years old now? I remember back in the day they only had one $40/mo unlimited plan and you can get a discount if you join a group with rates as low as $25/mo depending on the number of members.
Iirc, Visible recently had a pretty good deal for the iPhone 16e where you get a discount for the device as well as monthly service credits for a year or something. Unfortunately, it might have been for new users only.
Mind, the postpaid plans aren’t too bad for family plans. I believe our AT&T Unlimited Elite is like $40-42 per line.