Shouldn't we be more interested and concerned to know the *real reasons* super large brewing companies, with no craft brew history or dedication whatsoever (like InBev), are buying up smallish craft ones, such as Blue Moon, Goose Island, Boulevard, and now Blue Point. It can be hardly based on profits. Could polluting or confusing the consumer market be a part of their strategy? In the past, before I became more beer educated, I've "accidentally" bought Shock Top and Blue Moon from the craft beer fridge not knowing their history or whose wallets got fatter. They're both very mediocre.
One reason I can come up with is that small craft breweries' owners could be concerned about continuation of their so successfully created brand, beyond their own life (Boulevard perhaps?). Who can they pass it on to so, with time, they're just more than a mere legacy? Large companies can both afford and provide such "service."