Certainly lots of folks are of the opinion that the wording on Tesla's web page
does not prohibit using supercharging specifically to avoid having to pay your own electrical costs. And technically they are right. That's the letter of the law.
But I don't think it's the spirit of the law. Just because something is not
prohibited does not mean the usage aligns with the intent of the provider. Tesla has always discussed supercharging as removing the obstacle to "long distance travel" and take a "road trip" (Elon's words), where you don't have alternative typical destination-style charging available. Note the description on Tesla's web site regarding supercharging on the Model S page:
Now, folks may want to make the argument that a long commute is a road trip. I tend to disagree
if you could reasonably arrange for facilities to charge on a regular/daily basis. If you can do that, and instead are using superchargers just to avoid paying electrical costs even if it's several hundred dollars, (after all, cost of commute is part of considering a job), then my opinion is that you using the system in a way that Tesla was not really intending.
As an example: hotels provide free ice for guests. In several situations I'm aware of where our large organization was arranging for a convention, it became obvious that some guests were using the ice machines to fill their coolers for the activity the next day. It only took a small percentage of folks abusing that resource to cause problems for the vast majority of the rest of the folks.
Was that usage expressly prohibited? No. Was it a problem to do as it wasn't in line with what was intended? Yes.
And therein lies the rub:
The usage of superchargers other than for what's intended will not scale well.
Most people probably take road trips every few months on average. If it's every 50 days on average, Tesla needs to accommodate 2% of Model S users concurrently, spread out over the common travel hours of a given day. If instead just 5% of folks supercharge every day, and likely during commute hours, then the load at those times could easy be 10x what Tesla has planned for. If you keep biting the hand that feeds you, sooner or later you are going to regret it.
So, I'm under no delusions that people will go to whatever means to save a buck, but I think it's unfortunate. And although it has to do with HPWC charging at a Tesla Gallery location no longer being offered, I find one of the factors leading to that decision telling, according to
Lump: "
I was told some locals were abusing the privledge & leaving their cars there all day long so they were forced to close it off to all".
I fear similar will happen with supercharging over time if folks abuse the system.