Yes, the above-mentioned websites are very good for references because ICObench is giving a very good rating for the project which has huge potential in terms activity and team role in the project. We should not consider every project but we have to consider most rating projects.
Not at all. Its never been a good preference for you to rely on these rating sites.I dont know if you are aware on current issues with these rating sites or not
buti would tell you this that most of them can potentially be paid up to list out or sponsored or recommend a certain project neither a shit one it doesnt matter.
So, you would still end up on getting a good preference for long term since you would end up on a shitty project.