Iconomi said the whole time they are a investing platform for everybody, professional investors included.
At the moment actually they focus only on professional investors regarding marketing (see meet the managers events). Can't see a reason why some professional investor would say pass at iconomi platform.
Actually i can find a few reasons someone that wants to invest in crypto BIG time can make himself a private/public DAA with the platform being super easy to use.
They have top security. They are insured and use cold storage. This is what professional investors are searching for.
Big four audit it's also in the roadmap and goal is to gain trust from big money.
Fiat gateway it's also a tool for big players. And at first will be open only for big deposits.
Almost everything they develop it's meant to bring big investors.

got some questions

why would you think professional investors would avoid Iconomi platform? what would they have as a alternative with decent fees and fort Knox security?
why should columbus pay fees to iconomi if they don't host the funds?
DAA's produce fees to iconomi when you let your money on the iconomi platform (managing fees) and when you sell from a daa fund from the platform (exit fees).
they don't perceive fees from financial operations outside the platform and i did not hear any rumor about they planing to do so. Do you have info otherwise?

i don't use rocketchat if what info you have is from there please share.