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I (and others) see one of the aspects of steemit as a defacto crowdfunding platform. One could definitely say that i just pitched the idea for Steem Sharks (a pitch show) and got that idea partially funded. Much more important than the steem dollars though, was all of the upvotes which clearly signals to myself and the other potential 'steem sharks' that this project may have traction... within the steemit community anyways... blah blah i did not answer your specific question. Part 2 on way lol

Steem Sharks will look at any post that has #steemsharks and hopefully only entrepreneurs looking to launch will use that #

As here has already been a ton of great peojects started / posted, many i have missed... perhaps those posts could be emailed to steemshark@gmail.com and/or an update on the project could be posted with #steemsharks

So to get on the show... if one or more steem sharks believe in your idea, you will be on the show.

"Can a steemit post series be a pitch...?"

Maybe, it could. I am not sure. I will check out your content and respond.