I say again: I downloaded the trial version from APPLE server, not using an hack but just a direct link.
Do you think apple's engineers are idiots ? If they want they could remove any possibility to install those trial versions, or implement a check to avoid any upgrade starting from trial.
If the allow this is because Apple doesn't mind about iWork anymore, maybe due to an incoming new version.
Based on the information in the OP and the article linked, Apple has stated that it is aware that their software can be obtained through non-supported routes but that it relies on the judgment of its customers to avoid ineligible uses of those methods.
Apple has stated that it rather have unethical users abusing those systems than deprive legitimate owners of their products of the means to benefit of the updates they provide for their purchased products.
If Apple had wanted to make iWork available for free because they don't care for it anymore they would do so by making it free for every body.
If Apple intended to make the iWorks Apps completely free for everyone without prior purchase there wouldn't be any need for the installation of a discontinued trial version first.
If Apple wanted to make iWorks free the iWorks Apps would simply have a FREE download button in the App Store for everyone. There is plenty of Free content in there. iWork Apps not included.
Apple has issued statements clarifying who qualifies for free downloads of those Apps. None of those statements say anything about the downloaders of discontinued trial versions becoming eligible for free downloads. On the contrary, on the pages for those products it still says that these these trial versions have been discontinued and the actual Apps must be purchased. Separately or as part of a Software bundle with a computer purchase.
No matter how you look at it you'll be left with these realities.
You are eligible for Aperture 3 updates because you purchased that App.
You were not eligible for any of the iWorks Apps because you didn't purchase a computer that had them bundled and you never purchased them as standalone products either.
You walked into the virtual warehouse through an open back door and took a discontinued product without asking if that was ok. When informed that it was not actually ok but that Apple won't pursue the matter because it relies instead on the ethical awareness of its customer base you became indignant. There will likely be no consequences so that leaves an opportunity to reflect on the ethical dilemmas. Enjoy your free iWorks. I'm done moralising about it.