The article seems to be talking about "business advice" dispensed via tweets and Reddit comments? Why would anyone expect that to be of any value?

The answers to any of the follow-up questions posed in the article will vary greatly depending on the specifics of the business, so it's not surprising that there are no generally applicable yet specific answers. Even serious business advice/education from a reputable institution can really only provide you with an analytical toolbox or framework that you can then apply to the specific domain you are active in.

Ultimately, you get what you pay for (and if you're not careful, you might not even get that).