Resteeming can attract more people too me which raises my future profits by a large amount actually. Its the same logic for reddit, twitter and facebook. actually.

Reddit karma is worth real world money to people who know how to sell accounts.

I know a lot of people who make a living by networking on Facebook and Twitter. Having a following on any social media has a substantial monitary value to it.

The corporations that own reddit, twitter and Facebook profit off of shared content. So your argument about this being different on those platforms is objectively false. In those cases its actually even worse because the person who posted the content isn't even earning profit, a third party who owns the page does. Post a video on Facebook can earn Facebook thousands of dollars.

By your logic aggregation is morally wrong which is objectively false. A huge aspect of the internet is aggregation. I cited the original author in the tittle. 

By your logic YOU SHOULD NOT be doing lets play videos. You are stealing from the game developers. Making video games takes years and years of effort and your 8 - 12 minute video can make you far more profit than the devs made for that same amount of time. Delete all of your lets plays right now you self proclaimed thief.

Seriously YOU CANNOT be doing lets plays if you think my two paragraphs was insufficient content for a 30 minute video. As a game developer who has worked countless hours on making game content, I demand you take your lets play videos down.

Or you can admit your moralist argument is pretty weak and get over yourself.