Due to accusations of recent illegal activity involving insider trading, ESPN has agreed to limit its usage of daily fantasy sports ads.

An ESPN spokesman told USA TODAY Sports that “DraftKings made the decision to pull their advertising for today, which we have obliged.”

The New York Times reported on Monday that a DraftKings employee was caught using insider information to win $350,000 at FanDuel, a chief competitor. The DraftKings player allegedly received important lineup details that aren’t available to the public until lineups are locked in on gamedays.

In other words, daily fantasy sports could theoretically become a rigged lottery worth millions to the winner.

ForTheWin’s Nate Scott recently penned an interesting piece detailing his belief that this could mark “the beginning of the end” for daily fantasy sports betting sites.

The New York Attorney General has opened an inquiry into FanDuel and DraftKings, prompting several investors to pull out.

Scott writes:

This was bound to all come falling down eventually. DraftKings and FanDuel found a loophole in the gambling laws in this country, and that loophole will be closed. Whether or not you agree that gambling on sports should be legal, it’s not hard to see that these daily fantasy sites couldn’t go on existing with a different set of rules than everyone else.

Daily fantasy will continue to exist in the future. But the world we know now, where DraftKings and FanDuel operate in world without regulation, is fast on its way out. It couldn’t go on like this forever.