The Priority Support Bullshit

I'm not sure I agree with this.

Tiered support is a fact of enterprise support.

The challenge is to provide a lower tier of support (email, business day, 24hr turnaround), vs SLAd instant response (within 1hr).

In this case, DynDNS talks about providing email & phone support too, but only during business hours for their cheapest plans.

But phrasing it as

   We attempt to respond to all emails within 24 hours of receiving them.

sure sounds condescending to a paying customer.