Aight, here is my analysis of your pitch and a few things I would include in a pitch.

To be blunt and honest... I do not like the first three lines.... at all. I think it sounds too much like a spam comment that you'd see in the Youtube comment section. (Ever see those? They usually go like, "Hi everyone, let me show you how I made $10k online fast and easy!" (Just click this link to my Trojan filled site!))

Because of that, people will disregard this completely. I think that you need more of a catch, but something that sounds less focused on the BIG earnings you can make on here. (Kinda like you did in the 4th line) (If you tell people the truth, that people can make thousands of dollars on a single post, than some will be interested... but most will immediately think "Scam")

I would shoot for something a little more like that 4th line:

"Hey, check this. I joined a website recently called Steem.com It's pretty neat, you can and will earn money just for interacting with people. However, the best way to make money is to be a content creator. Just like being a YouTuber."

I think the strongest thing about my catch was comparing it to YouTube. People already believe that YouTube is a career or a good way to share your content with others and earn a quick buck. Because I am comparing it to another successful way to earn money (not easy money) on the Internet, they're more likely to give it a shot and not think that it's an "Easy Cash" scam.

I like the part of your pitch where you included "Finance to Photography." I think the future of this site is going towards being (sorta) split into many communities of specific topics. (With people being part of many communities of course) Showing that this site isn't focused on just one thing and accepts many different interests far and wide is a great way to make people feel more comfortable.