If you thought professional athletes' salaries were outrageous, wait until you hear how much certain superstars could make for a single tweet.

According to Opendorse, a platform that connects athletes with marketers, the world's most popular players can earn upwards of $100,000 for typing fewer than 140 characters. The company valued a single LeBron James tweet at worth around $126,000. But that's nothing compared to what another 30-year-old superstar could make.

Real Madrid star Cristiano Ronaldo, according to Opendorse, could net $304,000 in one tweet.

That's right, all it takes for the handsome Golden Boot winner to put away more than a quarter of a million dollars is to type out one tweet.

Ronaldo has 34.1 million followers, which trumps James' 19.5 million. Ronaldo is also perhaps the world's most recognizable star in its most popular sport. On his Twitter account, Ronaldo mixes posts about soccer with those meant as advertisements. Here are a few in which he is pushing a product:

James has tweeted more than Ronaldo (4,613 to 2,292) but seems to advertise less. Here are some of James' brand-based tweets:

James is careful with his tweets and reportedly turned down at least one huge offer:

With great power comes great responsibility, and James has been burned before for tweets seen as disparaging toward one of his endorsers.

James and Kevin Durant are the only basketball players and American athletes who made Opendorse's top five list. The rest of the men are soccer stars.

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