Where did you get that from?
DIGI got only 64m, as other 9 other pools delegation, from CF at the beginning of Shelley era (and it’s and was well known by lot of us), i.e. the 1/10th of their total stake as a temporary recognition of their long term support in ITN and in the community as general (i.e. a reputation based on their past but continuous support of Cardano).
I think, 64m was chosen based on the convenience and security, as they had to split their stakes to small some smaller portions and 10 wallets seems a reasonable to handle instead of having 20, 50 even 100 wallets.
I would say, they deserved it, despite the fact I am highly against to any SPOs who is operating more than one pool.
Because, just very few of us here for very long who continuously supports Cardano way long before this Staking crasiness and Rick was one of those.