No, I think the advertisers learned of ad blockers and started putting pressure on the new CEO. "Why am I paying you $X,000,000 for an ad buy that people can just block? And you're not doing anything about it?!"
So they put some development resources behind it, make some noise, get the internet in a tizzy, so the advertisers feel like they're being heard and listened to and some progress is being made. Then later they can say, "hey look, less than 1% of ads are being blocked on our platform but views have gone up by 6%, so we'll only increase the ad cost by 5% this year and call it even."
Boom, everyone wins and they can drop it, at the cost of just a little bit of their dignity and self-respect.