Allow me to introduce the Tor Browser to you.

Alternatively, you can move your bitcoin to a new address after participating.

If BIP322 is widely adopted by wallets, we’ll try to support it as well.

The rewards are funded by the event creator

Rewards are distributed based on address balances, regardless of which option you choose. In this event, eight addresses will be randomly selected to receive rewards. The larger the balance, the higher the chance of being selected and the larger the reward share. If the reward allocated to a winning address is less than 1,000 sats, that reward will be redistributed to the other winners.

Here are two tutorials.
1.How to reply to a Koinvote event (step by step)
2.How to Use Electrum to Sign a Bitcoin Message and Join Koinvote

Please make sure the BTC address you entered is the same address you used to sign the message.

“…bank lobbyists have drawn enough support from senators to back their worry that stablecoin rewards programs could be close enough to deposit yield that it jeopardizes the banks’ business model.”

You don’t have to offer a reward, but in practice, participation is much higher when there is one. As for weighting, it’s mainly to prevent Sybil attacks. Without it, someone could split their BTC across many addresses to farm rewards.

Yes winners are selected randomly, but weighted by Bitcoin balance. The more BTC your address holds, the higher your chance of being picked.
The reward is provided by the event creator.

A Bitcoin vote on this has already begun.
Do you support the Israeli-US war on Iran? (200k sats reward)