Facebook is centralized and yet users can create multiple accounts on facebook, hence a decentralized or centralized network does not imply differences regarding the issue of multiple accounts.

The issue of multiple accounts in itself does not create problems for the Steem Blockchain economy when used appropriately as is the case with the multiple accounts managed by the General Manager of Steemit INC; The multiple account system creates problems for the economy when a user creates multiple accounts to make it appear that they are different users.

This situation for years has occurred more than anything around those who manage a large amount of Steem power, who create rules for new users and thus save their daily vote and then cast auto-votes towards anonymous accounts that they themselves control or that they created with the name of their close relatives.

Behind several accounts of verified users in the "Community of new users" there can easily be a single person managing them at their convenience, it is necessary to have a lot of experience in Content Curation to detect these situations.