Can we use AWS Spot instances for guaranteed mining profits?

Question

By basic math, we can calculate the profitability of mining a specific coin in a mining pool. If we set the spot pricing limit to this value, will it not ensure that we make profits regardless? Also, no capex !

Answer 1

Spot Instances can be interrupted by EC2 with two minutes of notification when EC2 needs the capacity back.

That means that you still won't make profit regardless, because to mine some coin you need some time. Depending on the coin and instance type it may be from several minutes to several hours. Spot instance can be interrupted any time, that means if it will be interrupted before you mine something - you payed for nothing.