Not reliable, those so-called channels are fooling you. It is impossible to have so many resources for big companies and training courses for such intermediaries. Staging and so on, these are all the words sent by the training class to your target customers, which makes you believe that the successful cases of paying money may all be P-charts. It's nice to say it when you pay the money, but it's not like this after you pay it. As long as you pay the money, you may not learn anything and the money is wasted. It is impossible to refund the training course.