I got the same email and I have been trying to register my fold 4, however I keep getting an error when I enter my imei number and I'm entering imei1 and selecting the correct model, colour size from the drop down. Anyone else having the same issue?
@Jagga_a: Are you entering the IMEI number as it appears in Settings > About phone? This should be 15 digits long, and free from any special characters. When you enter it, double check that there are no spaces at the beginning or end of the number before you submit the details. If the issue persists, try the IMEI(2) number in Settings > About phone to see if this helps.
Wow thank you all, a nice surprise but a shame these need to be sought out.