#AWS Instance Size Gaps - Why so big?

[coreyacoogan]

I would love to try JasperSoft multi-tenancy on AWS and see how much better it is to the Logi solution I'm currently using.  I am a startup so we don't have a lot of cash.  I don't understand why there is such a large gap between the 2 least expensive options.  They go from $.90/hr to $3.00/hr.  The M3 Medium is too small for my needs but $3/hr is beyond my price range.  Are there any plans to add something between those 2 low points?  Perhaps something in the $2/hr range?