I had really never gotten that deep into considering it vote buying but I could see your point. I think it is still too early to tell as the EOS year long ICO was based in the concept to provide better distribution to create more balance and decentralization on the network when launched. Unfortunately, I think there is a large numbers of EOS token holders who have it for their own benefit to sell at a higher price and based in speculation instead of what it can actually achieved. It will take time after launch to see if the goals of balance will be achieved.