The advertiser will keep the advert running if they are making a sufficient ROI This means there is likely to be a decent conversion from the people clicking the advert so it keeps the CPC high to ensure that it is more likely to be displayed. Congratz on the 1 page. Hopefully it retains its high performance and you can build up either around it or by creating more unique pages in a similar vein.
It all depends on what ads are running on your site that day. Some days your revenue will explode and you'll make a killing other days it will be slightly lower, but it all depends on the ads that are showing o your site that day.
Well done OP - really inspiring to hear 12% CTR and 32 clicks means you're getting that off less than 300 impressions My advice is don't change a thing, but work out what the "magic formula" is for you and seek to emulate it with a new site. Best of luck (Y)