OData is particularly interesting because its design has clear overlap with GraphQL, and it's a lot older. This means it could even be brought up as prior art in some patent cases, maybe.
There's significant differences, but it means that if someone designs an "OData without the suck" then there's a fair chance Facebook doesn't have much to go on.
That said they can still play patent troll of course - patents hardly ever get evaluated on their merits in court AFAIK.
