- Instagram piggybacking off of Twitter & Facebook to grow their own network - Imgur piggybacking off of Reddit & then grew into their own platform - Red Gifs

- Instagram piggybacking off of Twitter & Facebook to grow their own network - Imgur piggybacking off of Reddit & then grew into their own platform - Red Gifs piggybacking off of Reddit NSFW sites to post short porn clips (idk if it'll be successful to monetize though)