[theshrike79]

It's not a loss leader - as in they're not making a loss on the subscription.

Because they control the harness(es) and the backend, they can optimise caching and thus the costs to them.

[siva7]

I'm giving up. Caching is optimized server-side on a product for which they can't control the client.

[bitpush]

Loss leader doesnt mean $0. Loss leader means it is subsidized to attain another, larger goal.