We've been getting lots of great offers on our Bonvoy Boundless cards (my husband and I each have one). Over and over I get the "Tap 3 times get 500 pts" which is so simple to do (on my third one this year). My husband currently has 5x on all purchases until the end of May, and he just got 10X on any Marriott charges (can't recall until when, I think the end of June). Tricky part is remembering to use which of our cards.
They have come from a variety of sources...some by e-mail, some when we log onto Chase, and some when we log onto Marriott.