Whether its true or not, that the "movement" made any impact on these decisions, Sony should absolutely portray it as such.
It is free advertisement for them to say "gosh you guys did it! thank you for helping us!", it comes across as humble and makes the enthusiast gamer who mostly participated very happy.
Sony would not have had this free advertisement and as much good will, had they on 20th February just said the same things, their E3 would not have had the same amount of punch to it.
Maybe it was deliberate, maybe they knew Microsoft was going to do this, after all we knew, what, late 2012? Was that when VGLeaks and Edge posted all this? They just saw a opening and used it to their advantage.
And i am not trying to downplay any of your efforts, to the folks that participated, you did a great deed, and it is really possible that you made enough noise to help tip the tide.
Everyone wins in this scenario, Sony gets more in touch with consumers than they have been for decades and consumers get to feel like their opinion actually matters.
People make it sound like there was no cost to Sony for playing along, but that isn't true. They have now committed very publicly to supporting the ownership-model of games, where I'm sure they would have preferred to keep their options open if it is indeed true that certain publishers were very against it.
They made a YouTube video that has been seen by 11 million people explaining that you can simply hand a PS4 game to someone else to share it. The video doesn't say "this is how it works for first-party titles--third-party games may differ," and that distinction will be completely lost on mass market consumers who don't understand how the industry works. If third-party publishers try to implement DRM tactics, Sony will take the heat. We've already seen how any hint of that is going to cause negative blowback to Sony, and their reps have been scrambling to correct any quote that suggests they aren't 100% committed to this. At this point, they are probably way more invested in the anti-DRM movement than they ever intended to be, and really have no choice but to ride that wave.
Even if it was what they intended all along, they no longer have the freedom to decide these issues on a case-by-case basic. The campaign gave them a reason to cross the river DRM and burned the bridge behind them.
So I don't think this was "free" publicity. Accepting it meant cutting off strategies that could have led to better relations with third-parties, and forces them to get more involved in how their third-parties implement things like online passes than they probably wanted to be.
And the campaign made sure that all of this unfolded in the most public possible way, as a deafening warning shot to the pro-DRM factions.
Even if this changed none of Sony's internal plans, I believe it will have a significant effect on their future plans and the future plans of many other players in the industry.