I have a start-up company (USA) that will be running on AWS and have the idea to use ONLY Spot Instances (until further funding is acquired) for our initial 2-4 month launch in order to save the maximum amount of money by constantly monitoring our bid price...

Since Spot Instances are reclaimed within 2 minutes if your bid falls below the market price, what if I were to CONSTANTLY adjust my bid to be above market OR set the bid to an amount that the market price never reaches, which IS STILL A BIG DISCOUNT, by studying the market price history.

Also, just to be safe I could have a few small on-demand instances running as a fail-safe in two regions.

In that case, wouldn't I theoretically always save 1/4 - 1/3 the price of using solely Spot Instances?

Does anyone have experience with this??

THANK YOU