So, with the ICO Syndicate -does the people that manage that type of group invest in the coins they are announcing to the subscribers?
Yes, it's also possible to suggest which of the ICOs with upcoming pre-sale you would like to see the Syndicate to reach out to. And it's ultimately up to you what ICO deal you choose to invest in and which one you'll pass.
I wouldn't be afraid of shitcoins swarming the list, as that's not in anyone's interest - you would simply hit the unsubscribe button.