I'm wondering, what is that ICO agency do for ICO-campaigne? Is it like a marketing unit or they also provide legal support? And token sale - do they manage technical side of the question? How do you choose a good one? Have you ever worked with any?
I think that the best way for in this case it to check out a few examples like how real marketing agencies work
Well, I'd like to such you a cuple like these two
1.
https://icopromo.com/2.
https://moderntoken.com/