Whoops! @Sasha @selah, missed your edicts by 24hrs, but wisdom does not grow old.
Safaricom buying a bank is messy. They already make non-funded income from MPESA, so the issue would be interest income. Surely, this could be worked out in the agreement with the fund holding Banks without all the nastiness of being a bank.
And Google's core business is ever so SEARCH (90% of revenue) just as Safaricom's core business remains so VOICE/SMS (77% of revenue).
And remember, all diversity is initially leveraged on core business, hence share of net profit should be more skewed towards core business as this would discount VAS/ACQUISITION/DATA net-profits, which we can expect to be almost non-existent.