I might add some more to these in order to understand a scam cryptocurrency. Firstly, we need to check the raise amount, if it is too high, this will be suspicious. Team should put a low limit to increase their motivation for the upcoming investments. On the other hand, if they offer incredible bonuses, it is probably scam. This is pre-ICO. If they hide somehow, check these details and decide to buy their coins or not.
I will agree to you sometimes an ICO faking what they raised so when it is listed in the market they will sell it there . They faked it to create hype to investors that will look like a good coin to invest but actually they just want to sell it to investors In exchange. Since they have more of the supply they can easily manipulate the price and faked the demand by seting buy Orders
They are manipulating as long as they can, sometimes they are saying that they have reached the hard cap but they can't even enter a good exchange, they just listing on an exchange which is free and no actual volume at all. So, for me, that's very obvious that they are not telling the truth, especially if they can't provide what was the actual raised, or proof of what have been collected and where are they going to use those fund.