Earlier quoted context omitted.
A fair point for sure. The rationale is the $10 million headline is the annuity value of the jackpot, and it's standard practice for sweepstakes or the PowerBall/MegaMillions contests to use the annuity value for promotion in marketing materials and on the website.
This is straight up lie.
First, the difference between being mistaken and lying is intent. The site guidelines call for being charitable. So unless you can prove intent, don't call out someone for lying.
Second: Just saying someone is wrong/mistaken/lying turns into a five-year-old's argument: "Am not!" "Are too!" That's not a useful conversation, nor even an interesting one. Instead, supply some evidence that the rest of us can look at and judge whether you're right. (Actual evidence might even convince the person you were replying to - some of us here do actually listen to facts from time to time.)