The way I interpret this closing reason, we do not want questions that ask for an evaluation or comparison of services. Examples for off-topic questions:
- What's the best exchange in country foo?
- How do you like service ABC?
- Is X or Y better for Z?
- Is ABC a scam?
- Let's collect all XYZ by posting one book/service/course/wallet per answer…
These sort of questions inherently subjective and prompt one-line answers, astroturfing, and other answers that quickly outdate.
However, I would consider the following questions legit and on-topic:
- How can I do XYZ under these circumstances?
- What should I watch out for when I choose a solution provider for that problem I want to solve?
Questions that focus on the how and why prompt answerers to provide expertise. While expertise is still somewhat subjective, it is valuable and non-trivial to come by for new users. Note that these questions still often get low-quality answers, so we should rigorously require answers to such questions to elaborate: how it solves the issue the user is facing, why the answerer is recommending a specific solution, and how they know about it.