OTOH: if your BG points are about to expire, and you want to get SOME benefit from them,
(1) see if they can be extended for one mor eyear (usable in Blue or White seasons)
or, if not,
(2) (least desireable) convert to ChoicePrivilege points (which have NO expiry) and use them that way.
Yes, the economics (as pointed out frequently) are not very good, but it's a risk taken with perishable commodities (points that expire).
The current rate is 2 ChoicePrivilege points per BG point, plus a US$50/transaction fee for the conversion.
Sometimes ChoicePrivileges offers a deal at 4:1, 6:1 or 10:1 (if my memory serves me). No deals currently on offer AFAIK today, tho.
The number of points per night at Choice Hotels depends on season, day of week and location. Your mileage will vary...