Well, no, they didn't really. It is still protected and proprietary and not freely openly available.
They have had an offer to work out deals with other companies, but there has not been an openly published list of what their requirements would be in exchange, so it's a bit of a mystery and just nice sounding words right now. On the other hand, you're right that other companies did not show much interest in trying to engage with Tesla to work through what the conditions of such an agreement would be. It's a sensible decision to just stick with the open standard that is not controlled by one other company, who can change it on a whim.