Why the Download Is the Product
A prediction that costs nothing to generate has no natural price. Wrapping it in an installable file solves that problem: the download becomes the thing being distributed, the permissions become the thing being collected, and the calls displayed inside are almost incidental to both. It also explains why these packages are so consistently unsigned and so consistently absent from official listings — a listing would require an accountable publisher, and accountability is the one component the model cannot support.
None of this requires the people distributing them to be sophisticated. A repackaged web view with an added permission request is a weekend of work, and the audience arrives already convinced by a search term they typed themselves.
What "APK Latest Version" Really Answers
It answers a worry rather than a question. Somebody searching for the newest version is usually somebody whose previous file stopped working, and "latest" reads as a fix. In practice the earlier file did not break — it never functioned differently in the first place, and the new one will produce the same output with a different number in the filename.
For the market overview and what each kind of product costs, see the home page. Related reading: online tool entry.