Looks like all these accounts and @freedom act at the same time, probably controlled together, therefore @freedom initiated a power down at the same time as the others a week ago. However, @freedom was the recipient of all the powered down steem, so the @freedom account stopped the power down just prior to it's occurrence today. Basically its probably one person, multiple accounts, consolidating. (Sounds like those who know more think it's Dan.)
Roughly in my head, I'd say it's what? 5% of all Steem in these accounts combined? So perhaps Dan has more stake than we thought, I just hope it may be earmarked for more development or a special project or two. I guess it doesn't really change anything either way, just makes the wealth distribution even more concentrated. It'll still broaden over time.