So they didn't reserve any iotas for themselves; instead, they got the BTC that people used to buy the initial iotas. Six of one, half a dozen of the other.
... which isn't actually so bad when you think about it, as long as those BTC all went to their foundation.
Iota has bigger problems, like pretending to be more efficient by using a DAG, when in reality everybody still needs to see the whole tangle to verify transactions.