I got the email too, and I have never been an Altium customer.I wonder where they got my address? Could have been a trade show I guess.
Looks like to get the 25% discount I will have to go out and buy a competitors product first. Great idea! If I do that, I might find I like the competitors product!
To me, a one-off 25% discount is useless. Either offer a perpetual 25% discount, or make a real offer like an 80% discount for the first year. They would be better off giving it away for the first year if it meant new customers.