Man, expecting the minimal from companies who are supposed to deliver a pro... there is no SLA for any this, so you are right.
Also, why is there no SLA?
because there isn't one and people still paid for it.
My clients demand one, so there is one.
Because this is ultimately a beta service. The whole industry is.
You’re not getting a worthwhile sla on a subscription at this rate. What are you going to get? A few dollars? An sla isn’t useful unless it actually bites for the provider and actually compensates the customer. And it costs money - how much are you willing to spend for this insurance?