If I were malicious enough to design the system, I would make it a heartbeat. Skip too many heartbeats and your car bricks. It could be written in to the terms of the loan since companies are using in-car computers for repossession.
“Why is my car bricked?”
“Because you tried to disable our payment verification system.”
“I live in a rural area.”
“You’re like 1% of customers. Your loan contact says you have to drive within cell range once a month. Fuck you, we’re repossessing the car and keeping the money anyway.”
Myspace existed for a really long time after it ceased to be relevant. It actually only ceased to be relevant after they lost all the music that had been uploaded. That’s when independent musicians finally abandoned it, and it basically disappeared.
Reporting on “X” is what’s keeping it alive, IMHO. Stop reporting on it and it will stop being used. Alternatively, if there’s some major incident, that would probably be enough to finish it. It may eventually go bankrupt between now and then, but it’s actually pretty useful for people wanting to spread nazi propaganda so the far right will probably keep pumping money in until it collapses.