They're not measuring performance in the context of when things happen and in the time that they are. It think its only showing recent performance and popularit

They're not measuring performance in the context of when things happen and in the time that they are. It think its only showing recent performance and popularity. To actually evaluate how these do you need to be able to correct the model and retrain it per different time periods and then measure how it would do. Then you'll get better information from the backtesting.