Eric have release 3 article about putting advertisment at development magazine:

http://software.ericsink.com/Magazine_Advertising.html
http://software.ericsink.com/entries/Magazines_Dying.html
http://software.ericsink.com/entries/Mag_Ads_March2007.html

I don't think this is really useful for me, but this can be a reference as the discussion is in depth

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Few links about how to earn good money using online advertiment, don't know if they work or not, but look like the investiment is not that less

http://www.johnchow.com
http://desinotes.com/

How TikTok broke social media - https://www.economist.com/business/2023/03/21/how-tiktok-broke-social-media