You can vote for 30. And yes, a minnows vote is only of small consequence, but collectively they do matter.
My witness, which would love your support, is @steemcommunity. You can read about our project here: https://steemit.com/witness-category/@steemcommunity/introducing-steemcommunity-a-witness-project-by-abh12345-and-paulag
Thanks for your comments :)