Although this question has been on my mind for quite some time, the situation with twitvid.io
http://news.ycombinator.com/item?id=638526 prompted me to post it on HN.<p>I am posting this as a separate item because I didn't want to take attention away from the twitvid discussions, and I feel this particular topic deserves its own thread.<p>I know the obvious, generalized answers: patents, copyrights, trademarks, creating a strong brand, creating a following, blog, PR, SEO, making the product complicated, trade secrets, etc..<p>What I'd like to discuss instead, are unique ideas for barriers to entry. Also, real-life case scenarios and stories from YC founders and HN users, who have successfully spun-out their start-ups with competition high on their tails, about what they've done to leverage and to keep their first-mover advantage.