I think a big difference is when someone is pretending to be all about something else and tries to sneakily market to you. One thing is getting a free water bottle with an ad, another thing is when someone is inviting you to a "party" with free food and drinks and it turns out to be a MLM "party".
Netflix is giving away free water bottles (I hate them, but I use their fast.com super often to test the speeds), another is pretending to be a blog post, but actually being an ad (if that was the case here). You just feel lied to. You cannot take anything seriously you read there, as it will probably be super biased and you cannot get your time back now.