Sort:  

No, they seem to use the Steem accounts directly.

For example, my first account entry in steemd is account_create_with_delegation.

For steem account, their first entry is pow (mining proof-of-work).

Coin Marketplace

STEEM 0.21
TRX 0.26
JST 0.040
BTC 101666.04
ETH 3693.34
USDT 1.00
SBD 3.13