Yeah, without investment, it comes down to getting noticed and getting lots and lots of votes, as with all profit made by Influencers, from YouTube, to Twitter, to Instagram. In those cases, investment comes in the form of better equipment/production quality, advertisement, etc. But yeah, if you do get noticed and you keep on producing quality content, money can be made, that's for sure! :) Additionally, re-investment of any money you do make is a great way to exponentially increase wealth, influence, and status! If you take it all out every time you get some, you will never accumulate a powerful vote, and you won't see returns multiply once the price of Steem goes up. :)