A lot of the multiple signups are legitimate. As an example, I'm registered multiple times.
I'm sitting at an Airport. Literally, the only ISP actually here is AT&T Fiber. They want $800/mo for 20mbps. We have three buildings, and before I got brought in, the plan was to pay $2400/mo.
I put in a wireless point-to-point, and now we're paying $800/mo for 20mbps that's split among three buildings. I had a cable point-to-point that would have made things better, but COVID shut that down (can't get in the building). I've got another company willing to do point-to-point, but that's going to be $800/mo for 100mbit.
If Starlink is reasonable, that's three buildings here.
I have a home and a travel trailer for when I'm working in the field. Wireless internet through hotspots and trailer parks suck. There's a fourth install.
The cable internet keeps going up and down at my house. I have cameras and automation I want to keep working. If Starlink is functional, I'm going to set it up as a secondary internet with the cable.
So, I represent at least 5 installs the moment it's available. There are plenty other people in similar situations.