We shouldn't trust anybody for any reason, we can get the opinions from them and do the same with different people so if you are getting more positive response on average then its actually a good site but highly influenced by someone's popularity is just the stupidity.
Maybe we do not trust anybody without reason but sometimes, when we watch what they say on their Youtube channel, we can get into them and try what they say because we can feel curious about the result. So that can be the time for us to get involved because of their video. If that happens, that can drag us into the deeper of the gambling business and can lead us to use more money. They can use any material to promote the site and some of us will say that is an immoral marketing strategy but as long as we do not follow them, it will not impact us.