Suggestion that is counter intuitive. Use their ads against them. If you see a fossil fuel or other large GHG culprit, click on it. It helps the publisher and costs the advertiser money. An ad view is worth pennies, an ad click is worth an order of magnitude or two more.
ETA: Spend a little bit at the destination. Maybe scroll the main page or click on something. It takes seconds.
ETA: This applies to any website or mobile app with ads.