Some points for those who may have skipped the FAQ
(I'm one of them, and perhaps it's not mentioned - wouldn't know, as I haven't read it...)
These are from an email exchange with TopGuest support:
HHonors only includes Doubletree
Choice hotels is only Quality Inn, Cambria Suites and Comfort Suites
Wyndham, we currently have a partnership with Wingate
FYI, we currently only award points for check-ins at venues with 'Virgin America' in the name