Don't keep your hopes too high based on that as most of the advertisers will now go for pay per action than pay per click therefore there would be lesser or very low cost advertisers for pay per click. So even if it stays, It would not earn much.
I have published an article regarding Google Pay Per Action on my SEO Blog, discussing PPC vs. PPA from both the publisher's and the advertiser's perspective and showing two screenshots of Google PPA which is still in early beta. Perhaps someone will find it interesting to read. Have a nice day everyone.