Hi, cool service!

I have some questions about the pricing.

Say I want to use micro-1x with hard_limit/soft_limit = 20 and I get 40 concurrent request for one hour, would it cost $2.67 (micro-1 price) * 2? ($5.34) (monthly cost) If that is the case, can I set a limit on how many instances I want to run at most?

Another question: is the price calculated per second or is it there just to compare it with other services? If it's per second, since you don't fully scale to zero, should I consider having always at least one vm active full time?