A person creating a codec doesn't choose if it's globally adopted. System implementors (like for example Slack) do. You're don't have to tell the open source dev anything. You don't owe them to include their implementation.

And if their contribution was to the final system, sure, it's the owner's choice what the threshold for acceptable contribution is. In the same way they can set any other benchmark.

> Your same argument can also be used to degrade the performance for all other groups,

The context here was Pareto improvement. You're bringing a different situation.