In fairness to Berkshire, the A and B shares are both traded on exchanges. If the voting rights are important to you, you can just buy the A shares. In theory, if you had a metric ton of money, you could take control of the company just by buying shares there.
In Snap, you can't go on exchange and go buy the voting shares. They're held by insiders who won't sell at anywhere near the price of the non-voting shares.
In Snap, you can't go on exchange and go buy the voting shares. They're held by insiders who won't sell at anywhere near the price of the non-voting shares.