The actor explained that he was trying to raise money for his charity Water.org — and when the exchange heard about this, it also donated $1 million.
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When South Park starts mocking you, something has gone badly wrong.
And that's exactly what happened to Hollywood A-lister Matt Damon after he started appearing in adverts for Crypto.com.
The exchange's chosen slogan — "fortune favors the brave" — was criticized for comparing a Bitcoin investment to visiting Mars.
Damon was recently asked about why he decided to lend his face to the campaign, especially considering other celebrities have been badly burned by their endorsements to rival exchanges.
And according to the actor, the explanation is a very wholesome one.
Speaking to the Associated Press at the premiere for Air — and looking a little uncomfortable while doing so — Damon explained that he was motivated by the fact that Water.org, the not-for-profit he founded, was having a bad year. He added:
"I gave my whole salary to Water.org because we were down — and Crypto.com heard about that and they gave $1 million to Water.org. Completely, just on their own. So I definitely have a lot of gratitude to them and for what they did for our foundation."
Water.org aims to bring clean water and sanitation to the world — and the charity says that 771 million people globally currently lack access to a safe supply in their home. What's more, 1.7 billion don't have access to a toilet.
It does make you wonder how many other celebrities have used the cash they've received from crypto ads for good causes.