Publicity, more people know about Bitconnect despite it being a bad system.   Its infamous even, even bad publicity sells some kind of story I guess but how solid is that capital figure given is another matter.    Market cap isnt the most certain valuation, I think circulation and usage is a better system to measure potential value overall.

I dont think there is any must to do action for people who will continue to use BLK.  This is just a new project available optionally.  I've not heard otherwise