I would replace 'super interesting' with 'Super complex'. It's an example of how you can make the price of a $10-40/mo server complex to the extent that you need to read the blog post numerous times before you understand the construct.

And even then, one still needs to factor in the 'other' costs like I/O or IOPs, disk (persistent/EBS), IPs, internet and inter-region data transfer… before you understand the real cost.

And then you need to compare to other instance types (which soon will cover the full alphabet -- c, cg, cr, g, h, i, m, r, t… ) and then other providers.

You still have several unresolved issue -

1. Are your assumption on usage (cpu, I/O, internet etc) correct? Will they change? 2. How do I compare performance across providers for a given VM specification. 3. Can I get support when I need it?

And I am sure there are others

It certainly means there is room for other players who just make it simple, whether they are infrastructure folk (like DO/Linode etc) or platform plays that make the pricing understandable by the audience they are trying to target (like Heroku/Ninefold)