As reported by Business Insider. I can find no mention of this new policy on Tesla.com or the forum.
tesla3jerry, this topic is already being covered on a thread that has just slipped to the second page. You may wish to delete this post and comment to the existing one. ;>
Ref: https://www.tesla.com/about/legal The new Supercharger Fair Use Policy is about 2/3 down the page.
This new policy is just a warning shot to Uber/Lyft with regards to their notion of buying a fleet of EVs and subsequently use the superchargers. In other words, this can only apply to cars bought, owned/registered by Uber/Lyft. There is no way for Tesla to know what you use your car for. Granted multiple stops at a the same supercharger during the day would be highly suspect that you are using it for ride sharing, but still can't be proven.