They're going to have to cap it at some point, because it will become prohibitive. At 500,000 users it would be $500 to sign up.

It's economies of scale reversed, normally you'd expect the price for everybody to go down over time, not up.

Wonder what the way is that is justified to the end users.

In order to arrive at economies of scale, you have to first provide for the expenses of ramp-up. So far, admission is nominal for the value its payers perceive. Plotting growth against current cost should give a pretty good forecast of how much is too much. Of course, under the current special circumstances, we could even see a freeze.

The price should begin to reduce itself with a function of rate of signups.

It's $7.37 now. But it doesn't matter how much they charge because I will never be using their service, anyway.

Hmm, why is that?