Nice source of information, we can really grab some information from them and use it to our advantage but we should not rely from them only. In my case, I also use my instinct and decide the best action after grabbing some useful information.
As the information from them are not 100% accurate and there are some of them are bias also like they are paid in order to published that information, so it's better to become wise to avoid any problem later.
Well, the list given by the OP above is only as an auxiliary tool for analysis. The rest is that we decide to take decisions from the final analysis results obtained. And for me the most accurate information is feedback from other users, someone's review is an important consideration for me because they have direct experience rather than information from a site that could have been paid information as you said.
