How will you know if testimonies on some freelancing platforms are fake?

[Btaliat]

A freelancer should not fall for the hyping some freelancing platforms may be receiving. Some of them may not be real. There are some that are even AI-generated testimonies. A freelancer need to watch out when there is no brand listed in the testimonies. In real testimonies, making mention of the brands won't be an issue. Apart from this, they may be quoting unrealistic amount that freelancers on their platforms can earn. What do you think of this?