Validator incentives, Multisig, Bridge

Please help me understand.

  1. What are the incentives for validators to run a node?
    As i understand, it is not a monetary incentive.

  2. Who is holding the multisig wallet?

  3. Just listened to the interview Community Collateral Onboarding Call: January 13, 2021 - YouTube.

-Igor mentioned a future option to use Bridge funds in liquidity pools to generate incentives for validators and fund the bridge, so it has no or very small fees? - Is this just brainstorming, or is this being worked on?