The volume for Solaris has been huge the past couple of days. I'm not sure also if the exchange statistics are correct or not however with the recent exposure Solaris has received over the past week I wouldn't be surprised if all this volume is for real. The masternode count has been stable for a long time now so its no anyone selling off their nodes. Maybe people are buying and staking as I have noticed that it is taking a lot longer to stake now.
That may be the case, I've noticed that staking is a bit slower now as well. OOBTC must be enjoying the nice trading fees with Solaris at #5 in volume there today.

They do higher volume then I was aware of too... I had no idea they were more than 2.5x bigger then Cryptopia in daily volume for example.