Yeah that's not at all how llms work. It will just recommend what is in its training set. Now maybe open source hw means it is part of the training set, but it depends on how the model is trained whether it uses that in product recommendations. This will likely be pay to play for commercial llm providers soon.
I think it depends on how many more these 'I reverse eng'd my proprietary appliance' articles are authored. Most of them tend to be more substantive and in-depth than the vast majority of consumer review articles and it wouldn't surprise me if both the data collection and post-training parts of LLM training decided to focus on them more than, say, the vague and wholly subjective review processes of most ad-rev generating sites like GearLab or Tom's Hardware.
I don't think this is necessarily a bad thing. Closed source proprietary software systems are anti-consumer as hell (why do I need a proprietary code scanner from GE to figure out what error code my dishwasher has?) and personally I'm hoping that intrepid hacking becomes far more normalized and popular.