That's fine, because as a business I can decide whether or not that price is acceptable to me. On the other hand, if they are known to occasionally significant

That's fine, because as a business I can decide whether or not that price is acceptable to me. On the other hand, if they are known to occasionally significantly increase the price of their offering, then I have to factor that risk into my budget (let's face it: most businesses are locked in to their current cloud provider to a significant extent) so the price on the label is misleading. I much prefer to pay a bit more up front than to have to constantly guesstimate how much financial risk is introduced by my cloud provider's erratic business decisions.