I think that @good-karma is a dev for esteem (the app) which uses the steem blockchain, but not of steemit.com ( the website) which uses the same said blockchain. Messages posted with one will show up in the other. There are many that use the steem blockchain. See steemtools.com. The question is, how much volume can I expect if I setup credit card buys for steem on my site steemfiles.com? Accepting credit cards can be costly.