The premise of Hardware Recommendations is that Person A is looking for one or more product(s) that will satisfy certain criteria or complete a certain task. Persons B, C, D, etc. may write answers giving the details of products that can help Person A.
The problem is that there is a bit of a hole here where spam can get in. If Person E is affiliated with the company that makes a certain product that might be related to what Person A wants, s/he can post it in an answer and get attention for that product. If there is enough similarity that it could be a valid answer, the answer will not be deleted, and Person E gets what s/he wants. The cycle can repeat.
Person E can also self-answer, for added efficiency and a greater likelihood of putting an answer that matches the question well, thereby decreasing the risk of deletion.
How can we detect and deal with spam? The first part may well be impossible, but the second is important. Going forward, it could be an issue.