I was fortunate to visit the Calgary winter games by myself and DW and I attended the Atlanta games. In both cases my employer was an Olympic sponsor. For Calgary I won a sales contest and for Atlanta we hosted clients,
The host city will determine how the tickets are packaged. Their approach in the past has been to sell bundles of tickets covering a fixed number of days, x number of events per day, and a limited guarantee of one specific event. For example, a 3 day bundle including opening ceremonies and 4 sporting events, or a 4 day package with 7 events including finals in either basketball or volleyball.
This is how they ensure less popular events are sold. I expect them to continue with this approach. Location, US or not, makes no difference.
They also sell individual tickets for high profile events, such as opening and closing ceremonies, and some competitions.
Just getting inside the Olympic Park is great fun. Seeing the mix of people, so many flags, national colors, all the languages, all the friendly interaction is a joyous event.