ecommerce with a lot of paypal accounts?

has anybody tried to sell on ebay amazon or any platforms alike and use many paypal accounts to buy from yourself? does it work?

a key to success on these platforms is the ranking. they always say keyword optimization. however, many follow the cliche. how do they rank? what they dont tell you is that the first thing they rank is of course the ones that sell and make them money.

anybody tried?