When i enter ACCOUNT on COSS exchange, i get this message on top:
Important update:
You must set your revenue share identifier until 12.03.2018 12:00 UTC (read more)
This is only for those who keep COSS tokens on an external wallet?
Yes, I found this a little confusing too, it should state clearly that is only for holding outside of COSS like in MEW, etc.
When you have your COSS tokens in the COSS wallet you don't need to do anything, it all happened automatically in the update. It seems to be working fine now, at least when I go there it is... :-)