I've gotten points from an HGI stay that I booked through Expedia more than 10 years ago. Originally, the points did not post because Hilton Honors does not give points when you book through a third party. I called Hilton Honors customer service and they manually added the stay and points to my Honors account, albeit this was a long time ago, not sure if they would do this now. Ever since then I have not booked IHG or Hilton brand hotels on Expedia or Hotels.com, and now whenever I use those I usually just book boutique hotels or hotels in different countries.