This is a type of site where I will get most of my income within the first 24 hours.

Please share your tricks where one can get most of their AdSense income within the first 24 hours of a site's launch on the slowest day of the week for websurfing no less. It's very hard for me to take that statement seriously.

I know 100% sure that I have users using the site.

Do you know that from checking your raw log files ?

I had an issue like that and after many frustrating weeks of trying to track the problem I realized that I had created a channel but failed to assign the channel to the code that I generated. I was of course getting impressions and clicks credited to my account but lack of channel association made it appear that my data was not being recorded by G. So make sure that you go back and look at the adsense code, even start fresh if you want to do it. Just one more way to get to the root of the problem.