[boulos]

Disclosure: I work on Google Cloud.

Your analysis is close, but the on-demand (per second) pricing is also a lot less expensive. You should think of it as:

- Less than a full month w/o commitment => E2 up to ~30% cheaper (particularly for say 273 minutes per month or something).

- Full month w/o commitment => Roughly identical.

- Full month with a 1-year or 3-year commitment => E2 ~30% cheaper.

[amq]

I wish it was simply flat 30% cheaper. It is very misleading that 0.99% of month will be 30% cheaper than a full month, considering that Google Cloud is advertising sustained usage discounts everywhere.

[brianwawok]

Sustained usage has tiers. So .99% of a month would only be like 1% cheaper.