Putting it simple, duplicate content is content that appears on the world wide web in more than one place. Is this such a big problem for the readers? Maybe not. But it is a very big problem for you if you are having duplicate content (internally or externally) as the search engines don’t know which version of the content is the original one and which one they should be ranking.
Look at the biggest startup success stories and analyse their content. Airbnb positions itself as the place to find unique travel experiences with locals, Uber is the cheap, on-demand taxi alternative and Skillshare carved its niche as a free learning exchange platform. They all address their audience concerns in a way nobody else is doing and their content has a friendly, approachable tone – even when we’re talking about software startups like IFTTT or Slack.
I am so glad you used those tips and obviously have great results from it. It is all about creativity, I guess. If you think of a new and fresh way of generating traffic, that not too many bloggers are using already, you are on a roll. And Flickr was one of those that were not over saturated with bloggers searching for traffic. Thanks for the feedback and can't see the results with new strategies :)
Organic is different. Matching keywords to user intent means you may be present in many searches. The user may find you consistently, and once they get to your site, they are more likely to stay. Organic users are still your best long-term customers. In my experience, they have lower bounce rates and more pages visited, and they are more likely to return.
Good question, for most directories I use they ask for mobile number to send a message of verification, for the ones which phone you for verification inform the company before hand to tell their customer service people to be ready. I know the bigger the company the more tricky these things get you just have to find out what works best to answer the calls even if they give you a direct number to use. 
In all of the above cases, you’ve potentially found a page on your website that could turn into a keyword monster with a little extra content and keyword integration. Although we’ve discussed blog posts in this guide, don’t completely overlook the other pages on your website – these tips will work to increase organic traffic on all pages, not just individual blog posts.
Beyond organic and direct traffic, you must understand the difference between all of your traffic sources and how traffic is classified. Most web analytics platforms, like Google Analytics, utilize an algorithm and flow chart based on the referring website or parameters set within the URL that determine the source of traffic. Here is a breakdown of all sources: