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You can make money via Postloop, that is Get Paid To Post in Forum.

Just create good videos about what people are searching for, or videos on topic that interest you and apply for adsense before you know it you will start making money.

It's really a bad idea using your content on multiple blog site. It best you rewrite your content and share it on other blog. All just take a small portion from your content and share on blogs.

Try and submit your website to article directory website and also promote your classified on social media.

The benefit of pinging is that it will help to notify other search engine about your content quikly.

Blog Commenting does not affect SEO, It only improve your ranking or backlink. It will help your website but may not be instant.

Just write 2-3 good content daily, and google will always stick around your site, before you know it your website will look good to google.