Yes mostly are, this rating can change at any time. I have encountered a few projects that were rated as 5 stars but after the project failed to meet up their softcap or proven as a scam project, the rating went back to 3 or 2 stars. Some raters on rating websites are charging for money if your project wants to get rated as a good project, not only that you can request the context that will be posted on review too.

They are mostly paid, so do not pay attention to ratings. In general all rating websites are paid, so you can create whatever rating you wish, if you have enough money. Do your own research and do not trust such websites.

Investing in ICO/IEO, it's a risky business because, in recent time, a lot of scam project hampered the market so much, you have to judge very carefully if you want to really invest in any ICO, but I suggest you buy Bitcoin and hold for a long time, I think holding Bitcoin is the best way to make profit unless you are too unlucky, you know Bitcoin is the best coin in this platform, All the crypto's market depends on this Bitcoin price, Bitcoin will not vanish and it will bring a good amount of profit in the future, Not only that but also Bitcoin will dominate in the monetary platform if some country will approve it as legal digital currency, Only China and The USA are enough to change this situation.

making new altcoin with good features can make you very good profit, if you are a competent dev, ico and other things do not work anymore like in the past, people learned a good thin g that maybe still work is instamining new shitcoin, but you need to be in time and with proper hashrate

It's a legit investment for short term investors only but a scam investment for long term investors.
It's not even an effective way to produce money, let's say if you are participating in IEO and as early investors and you will always be a winner. For long term buyers and IEO token is also the worst thing.
Look at the current ROI for the majority if IEOs will say already traded below the ico price too.

Why are you looking for an IEO that does not verify KYC even though what I know is Binance, Huobi, Bittrex requires KYC if there is an IEO being done, I can't understand it with you, don't be afraid if KYC is handed over to a safer one.