[city41]

A product announcement is far more upfront and honest with its reader. It wasn't until the last third of this post did any action items emerge, 4 of the 5 being use a tool that starts at $337.

Not to mention Docker is open source and has a valid free (as in beer) tier.

I'd also complain about a Docker blog post that lulled you in and then recommended you buy a Docker Datacenter account.