It's a last ditch effort by Tesla to get some of that sweet sweet infrastructure money. If they can get any of the startups to bite, now their network isn't just for "1 manufacturer" and they are eligible. If this really was an attempt to advance electrification, the press release would have been accompanied by an adapter released to allow CCS cars on the Supercharger network. Based on this release though, I don't see that happening. This is what Elon was talking about when he said that the Supercharger network would be opened to other vehicles "by the end of the year".
Like has been said before, they should have done this long ago. The logistics of getting 10+ other automakers to switch standards now has passed the point of feasibility. Now, Tesla, (regardless of market share, still just one company) should adopt the "inferior" CCS standard as they have done in Europe, and stop complaining.