DEVs paid a listing for CB with their own money. So I dont think they gone after presale.
Well, they CAN get BTC from the presale and then dump the premine on the exchange, a usual story.
Time will show. Their nodes aren't that expensive to invest in(*), so it wouldn't be a great loss. But if they stay, it would be a nice income and a worthy purchase.
(*)Not like that 2 btc/note in that LRM 100% scammy coin
