Gab is more like Twitter and Minds.com is more like Facebook and Vid.me is more like YouTube and the biggest difference is that people are making money on Steemit already but the others not as much or they are working on it and in the future more will follow the crypto blockchain things that Steemit does. Gab is coming & the Gab founder was on Crowder this week and he said they are working on the crypto wallet thing on Gab so it can do what Steemit does.