Davar Academy No Longer Offering 50% Off?

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I am looking into Davar Academy for UL credits toward my BSBA at TESU. Browsing this forum, I found that Davar supposedly offers 50% off using this coupon: https://www.davaracademy.com/half-off.html. However, when I try to use it to purchase individual classes, it doesn't work. There's also nowhere to enter it when signing up for Davar's "Business Class" membership option. Does anyone have any insight into this?

Thanks in advance,
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