I know what you mean... its a difficult one because full time for one person is different to another but it is the best way to define it for now I would say, If we said it was for people who wanted to make steemit a full time job then everyone would be joining which would be great but defeats the purpose. What I would say is if you think you are working enough on steemit to a large portion of it your income then consider it as a full time position.... part time hours full time wages ;).