If you're offering services (as the primary source to make money from the blog), then I don't think this will be an issue. Since the more you share useful/actionable information (especially things that people can only find in your blog), the better the conversions.

With affiliate marketing/ads, I think giving so much information (for free) works very well too - given that visitors tend to stay longer (better impressions) and they also have greater chances of visiting back to the site.

For selling digital products, I believe the same thing also applies - the more you're giving away free information, the more your readers will trust you (and buy from you).

TL;DR - you make more money by genuinely helping people out (even it's for free).

Read more from Jason @ //kaiserthesage.com/