Sort:  

You are right but they have given permission to to use their content on other plateformes with references

Show proof that he gave you permission.

Thats on their website policy

Coin Marketplace

STEEM 0.13
TRX 0.22
JST 0.030
BTC 82244.03
ETH 1894.91
USDT 1.00
SBD 0.74