Sort:  

I have no idea what that even is there are endless amount of things out there. It is up to you do have own your own research and weigh the risk vs reward in using what ever service they provide for sharing your key with them.

If it was something like your posting key then it never hurts to check in on your account from time to time make sure you are not up voting anything strange that you did not authorize or where not aware of that they would. Along with anything being posted you did not write yourself.

If it is somthing you are no longer using then its best to remove them. Most sites provide that option on them to unhook the account.

Coin Marketplace

STEEM 0.18
TRX 0.16
JST 0.029
BTC 76114.36
ETH 2937.56
USDT 1.00
SBD 2.64