Earlier quoted context omitted.
From the "What you'll need" section of the first tutorial - A Mortar account. You can sign up for a free Public account with Mortar here. If you want to keep your customized recommendation engine code private, you will need a Solo-level account ($99/month). Beyond that, you'll only pay for your actual usage of AWS cloud services (we never add an upcharge). Kudos for the open source, but it looks like to actually use…
The code is all released under the Apache 2.0 license, so calling such an action "disingenuous" is itself disingenuous, (imo).
It's just that making a big press release and blog post that brags about open sourcing, vs the reality that you can't actually do anything substantial with the code without paying for it... it seems off to me.
I get what they're trying to do, but to me the whole point of OS code is that you can self-host, and/or modify it for business use if you so choose.
To me this would be better served by advertising "We like you so much, we're giving away access to our service for free for noncommercial and test use, and opening up the code to the library so you can see how it works", but that's less interesting as click bait.
Maybe i'm just mis-reading the whole thing and you can self-host.