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I am going to run the contest soon.

Offering

5 HBI shares and if I get enough interest will sponsor 1 month of premium.

I am going to add some prompt based theme posts in contest.

But brainstorming as of now.

Wow, good to hear this !

curate only premium members ,

That's what I do already, I do prioritize them. But I do not say "ONLY". Outstanding posts always have its value, even from non-members (#premium)

10 #HBD is too much for a starting service, imho. Even premium twitter is less than that. I would have started with 10 #LEO per month. I know is not the same, but more people would have participated, I think.

more and more buy and burn :)

Charge more