Why Ads on Steemit

I admire Steemit alot. Its idea to monetize content by leveraging on blockchain technology is revolutionary

But why does Steemit now put up ads, really.

Is Steemit growing to become like thos giant corporations we have come to fear like Google & Facebook? Are our personal data currently being mined? How much of my data has Steemit indexed?

I'm still very passionate about the Steemit vision and idea, but I would love to get answers to these questions, to allay my fears.

Anyone who is a top Steemit staff or agent should kindly answer