To answer your question (how many investors will be put off by centralized nature of this project that looks like it will be popular?), my answer is: probably not nearly enough.
I see quite a lot of crypto' enthusiasts coming from the position: "I'm 100% for decentralization... just don't ask me why."
The killer app' is still money, but money with a censorship-resistant accounting record.
Some crypto' fans talk about decentralisation as though it was an arbitrary technical accomplishment, that has little to no potential to defrock the financial high-priests of the Western world by opening up the market in money.
I wish they'd remember, it's not decentralization for the sake of it. Transaction cost and speed can be used against pro-liberty human beings, too. Is that really what we want... a more efficient central-planning polit-bureau? These technical transaction capabilities can form part of a corruption-beating effort, if the bigger picture is maintained.
It's the characteristic of censorship-resistance - provided by the decentralizing tech' - that is the key to obliterating the level of corruption we see in the world and the resulting number of aggressive wars being waged.
RE: Thoughts On Hedera Hashgraph Crowdsale