My client wanted to filter subscriptions by organisation name but it looked like the search function didn't search within the organisation field and I couldn't see an option on the Organisation field to include it in search results. When I looked through the code though it was set up to use a column called is_searchable and that existed in the osmembership_fields table. Setting that to 1 provided the functionality I was looking for. It would be great if that value could be set from the field definition screen.
I just edited code in the package to support this. You can access to My Downloads menu item, download latest package, upgrade it to your site and it will work (by default without having to edit data in database)