It's just that way
I purchased a Radical product on a different seller website. I reviewed it glowingly , 5 stars, just love it! The Radical company liked my review so much, I was sent a 25% off postcard, with no expiration date listed. A few weeks laterI tried to use it but the code did not work. I contacted the company using this sight twice by email to ask why my code doesn't work. My e mails were ignored.