Google have tweaked their algorithm, and as such it has reduced the remarkable payouts we may have seen and read about. Rather than try to identify the exact reasons, it is widely accepted that people who abused the system caused Google to adjust their methods to quash such abuse.
We may have seen MFA's, websites specifically 'Made for Google Adsense'. As such these sites DID make big money, but offered little or no content. Such attempts to 'work' the system would only have a short life span until the BIG G saw such a loophole and consequently shut it down. Although these sites still exist, they have been de-listed from the Google Search Engine. If you didn't know already, type - site:www.awebsitename.com - into Google Search and it will show the pages that Google have listed in their engine.
Google has tried to steer each and every website owner towards adding quality content. Without quality content your site is only visited for seconds. It is this very aspect that Google uses to determine the quality of sites. If someone is only on your site for seconds it deems the quality as low; if they stay on for more than 30 seconds you're beginning to get recognition.
So to earn a living from Adsense is much harder today, than it has ever been. If you are solely intent on relying on Google Adsense as your only income from the outset, it maybe a deemed as a mistake, unless you follow some sound business principles and get advice from an expert.
What a lot of individuals are doing is realizing that they have tremendous sites, and Google Adsense isn't bringing in enough money to generate their weekly income. As a consequence they have looked at earning revenue from other sources. Affiliate income is an option for consideration.
Alternatively, rather than give up on Adsense try generating more traffic. If you get a steady flow of visitors to your site already you may want to consider one option that will serve two purposes. This option is to write a short article, nothing too in-depth that takes weeks, let's say an article that's heading starts - 101 Ways To... - such as 101 Ways to Treat Acne. The process make take 2 to 3 hours. Prepare this document as a 'pdf' file and make it downloadable from your site for free.
In doing this, collect an email address for those wanting this amazing list, and using this list to generate further income from, and within the 'pdf' put backlinks to your site. This method is called viral marketing. As visitors pass the file to others, or pass the download link, more people will use the links within the 'pdf' to get back to your site.
I hope this article gives you much needed inspiration to inject more enthusiasm into your Adsense activity.