Choice expires after 2 to 3 years, ie, it always expires at least 2 years later, on Dec 31. So points that appear in your account on Dec 31 expire 2 years later, points that appear in your account on Jan 1 expire 3 years (minus 1 day) later, and points that appear in your account in the middle of the year expire in about 2 and half years.

And, no, there's no way around that.

US-based legacy arilines, as well as BA (and maybe other UK airlines) all allow expiration to be deferred by pretty much any partner activity.

Many (most?) other foreign airlines have hard expirations you can't get around no matter what. For that reason, I have not started collecting with any foreign airlines other than BA.

Amtrak is another one which requires that you have the credit card and use it (not sure how often, but I use it at least once every few months) to avoid expiration, if you aren't doing paid Amtrak rail travel.

And in case it isn't obvious, credit card specific points (C1 Venture "miles", FlexPerks points, ThankYou points) require you to keep a credit card linked to that program alive. (You can typically switch between annual fee and no annual fee versions, though.) But keep in mind that cards that show no activity for a period of time can be cancelled by banks, so any card you care about keeping but otherwise aren't using, make a purchase once a year or so with it at least.