Passive income: NO

Becoming a passive income earner solely through product reviewing is a challenging endeavor, with most individuals not achieving full passivity. While it is possible to earn passive income by building a large following and securing consistent sponsorships or affiliate deals, this level is typically reached by only a few outliers. To make product reviewing passive, one would need to create a system for consistently receiving products, testing them, creating content, and engaging with the audience without constant manual effort. Automation tools and outsourcing tasks like editing and content scheduling could help in achieving this, but they come with their own costs and complexities. Many beginners find it difficult to scale to the level of passive income due to intense competition, changing algorithms, and the need for continuous content creation. Overall, while some individuals may succeed in making product reviewing a passive income stream, it remains a challenging path for most without diversifying into other income avenues.