Amazingly this is the first time I am hearing about Cindicator. I see they have raised their hard cap of $15 million. It is hard for me to say if they could have reached $500 million. For one, their ICO started September 12, before the China and JPMorgan FUD. The ICO landscape is different now.
It is not impossible. Filecoin got $200 million in 1 hour, Tezos raised $232 million and EOS got $185 in 5 days. With the right names (background with Goldman Sachs, JPMorgan and connections in Silicon Valley) and strategic articles (Wired for example) it can be done.
I stand corrected, I forgot about filecoin. They had some serious money behind them already though. I wouldn't even really consider them a start-up. More of a branching out.
In my opinion it's a bad idea to compare the Filecoin, Tezos or EOS ICOs with others. For me it seems a lot of people nowadays only measure the success of an ICO by comparing it to these high-funded ICOs. That makes no sense, not every good ICO-project can raise these amounts of money and you don't need that much money to get your project working. You just have to look at other examples like Lisk or Waves, they managed to work with way less.