having an SRD and wanting everyone in the walled garden of DDB and VTT is a bit schizophrenic. Why have an SRD when the work created with it is work you exclude from your platform... Not saying this is not where we are headed in the short term, just that it is an inconsistent strategy. One or the other will have to give in the long run
Well, there are some distinctions that need to be made here to address that:
1. The SRD, whether wotc likes it or not, created a net effect, where everyone speaking the same "code" has the benefit of making that game the leader by being the most ubiquitous. Ryan Dancey addressed this during the OGL debacle here and elsewhere during interviews, I think he referred to it as "network externalities."
The more people who use the SRD, the less people are using other game systems. It contributes to the current monoculture that is dnd. THe fact that they even tried to destroy the OGL is pretty alarming as to how out of touch they (management) are with the community, as the 5e SRD, and previous SRD's cemented wotc's position as the market leader (according to Ryan Dancey, who created the OGL).
2. DDB is separate, just like the DM's Guild is separate from other platforms, you have to exclusively publish content on the guild and nowhere else. They own both platforms, and yet they also have the legacy of the OGL from previous employees that have now left the company.
That's part of why they hate the OGL so much, because it was made before Hasbro had full control of wotc, and its a legacy of the open source movement, something that microsoft hates as well. Current leaders at the company are former microsoft employees, its probably not a coincidence.