People don't appear to be divesting from the bankroll. 
The lack of divestments could also be because we're not at a profit all time high, and commission isn't charged until then. Current investor profit is 6150BTC and ATH is 6167.8BTC, so there won't be any commission charged until players lose another 18BTC. Would be an additional 0.5% profit based off of current bankroll size.
I have noticed that both number have increased since your post and no one seems to have started divesting yet. Do you remember what the numbers were at the beginning of March? (latest change to commissions?)