Logan Paul had a message for his 6 million Twitter followers: He was "all in” on a new cryptocurrency called Dink Doink.

According to the project’s creator, Dink Doink investors would receive shares of a cartoon character, entitling them to a portion of the proceeds if the googly-eyed figure ever appeared in a TV show or movie. Last June, Paul, a 27-year-old boxer and social-media influencer, praised Dink Doink on Twitter and in a public Telegram chat, before endorsing it again on his podcast, "Impaulsive.”

But by mid-July, the price of Dink Doink had plummeted to a fraction of a cent, and Paul was facing an online backlash. In his endorsements, he had failed to mention some relevant information: He and the project’s creator were friends, and they had come up with the idea for the cryptocurrency together. He had also received a large allocation of Dink Doink coins when it launched.