Conferences that call themselves “open” something are sometimes nothing but an attack on openness (not to mention freedom) and promotion of FUD about Free/Open Source software (FOSS); there’s an ample set of examples to that effect.
The cheapening of the term “Open Source” continues; sooner or later everything out there will be called “open” irrespective of what it really is.
This is a very lengthy and potentially expensive process. It’s happening or becoming necessary because the EPO nowadays grants patents far too quickly, in big numbers. In Twitter the EPO lies about such patents, equating them with “property” (which they’re not) as if to deny these grants would be “theft”.