Hello VenturaBro!
As we have previously stated, we aggregate ratings from 6 major ICO rating agencies and then calculate arithmetical average. The list of the agencies:
1. icorating.com (we take only the risk score!)
2. foxico.io
3. icobazaar.com
4. icobench.com
5. trackico.io
6. icomarks.com
Three of them need no introduction - Icorating, Icobench and Icobazaar are well-known and respected. We consider their ratings the most reliable and objective. We usually count them with a multiplier of 1.05 for each 1 point, e.g. If the project has 4.0 rating score on the Icorating.com website we count it as 4.2 when calculating the arithmetical average.
Othere agencies have been chosen on grounds of amount of projects they highlight - we picked out the websites with the biggest databases in order to show ratings of as much projects as possible. Their analysis usually is not as deep as one performed by the three previous agencies but it helps to provide a holistic view of the ICO market.
The number of projects was the main reason why we excluded such respected agencies as Tokentops and ICO drops from our sources of information - they don't have enough ICOs listed. This factor is extremely important for us since we try to provide investors with detailed info on the each ICO that bothered to get a rating.
We also plan to include new sources in our rating so at the moment we are reviewing three websites in order to choose the most reliable ones.
I hope that I answered your questions satisfactorily!