Sadly it's a problem at the top, the people who own it sell large amounts of steem on a regular basis. They explained they brought ads in to try and make it so they didn't need to do that, but until they make enough money to cover their overheads from ads, i think the article explained they were gunna keep doing it.

https://steemit.com/steemit/@elipowell/steemit-inc-financial-update