I do not know if this is a general offer or targeted but the offer was on my Omni sign in page, not sent in an email.

"Exclusive Member Offer Congratulations! You are registered to earn DOUBLE Tier Credits on qualified stays April 24 through June 30, 2019.
Offer TermsSubject to availability. Applicable for qualified stays April 24 - June 30, 2019. Select Guest members must register prior to completing a qualified stay to receive bonus Tier Credit. Registered members will earn one base Tier Credit and one bonus Tier Credit for every eligible night stayed in the promotion period. Tier Credits do not count towards earning Select Guest Free Nights. Select Guest membership, earning and redemption are subject to the program terms and conditions."