Donald Trump's tweets from now until Election Day are about to start delivering money directly to Hillary Clinton's campaign.

A new tool, Troll Trump, lets supporters sign up to automatically donate 50 cents, $1, $3, $5, $10 or other amounts every time the Republican presidential nominee tweets. (Given his past habits on the platform, that could turn out to be a pretty vast treasure trove of donations for the home stretch to Nov. 8.) The tool's landing page populates a new Trump tweet each time the site is refreshed to offer a sampling of the candidate's social media style.

"Show Donald that his unhinged rhetoric comes at a cost," according to the Clinton campaign's website. "Sign up to donate to Hillary's campaign every time Donald tweets!"

The signup also comes with a pledge:

"Hey Donald, I pledge to donate ____ to Hillary's campaign every time you tweet because I'm sick and tired of your hateful comments about the American people. Happy tweeting!"

The idea apparently was inspired by a tweet by Matt Bellassai, a former BuzzFeed editor and social media star, who made a joke on Twitter threatening to donate to the campaign every time Trump tweets. (When the tool went live, Teddy Goff, a digital strategist with the Clinton campaign, tweeted Bellassai a thank-you.)