The people in the comments might also be part of the scam. In scams like this, the scammer usually play different roles, they have different accounts which are used to signify interest in the comments and also to post testimonies of how successful they have become because they trusted so and so platform or trader.
You are right, sometimes when scammers are operating, they are always doing that in groups, so everyone one of them is always playing a role, and after they successfully scam someone, the money will be shared among them, so the testimonies that they are making are still in their plans. With good testimonies, people will be able to fall into their trap easily, so no matter the testimonies you see on social media, don’t trust them.
I have noticed this pattern by scammers in the past few years I have been involved in bitcoin. Newbies fall for the testimonials, not knowing that the scammers are the ones in control of the accounts. Sometimes a newbie who comes across such posts on social media would go through the comments to see what people are saying about the investment. Some people are convinced by the positive comments from “different” people, they also make the mistake of engaging these individuals in dms to get more information about their experience investing with such and such. This is very risky because now the scammers know who you’re and will do all they can to convince you to invest.