Dear Employer,
We have gone through your requirements.
The questions are,
1. A database of users: You need a database of users. The idea is, should we collect provide you the list of users who has clicked or who have visited your site?
2. The prize of the day: On what criteria would we going to choose the winner?
User will be able to see the current click number by clicking on the button. Also an easy control panel as well as PayPal and Facebook integration is fine. Also we will be fine with setting timer of the clicks with precise time units
We would like to discuss more for this project and want to give you the possible best solution. Kindly send us more info regarding your project. We assure you that we will provide you robust solution for your requirements.
Feel free to ask any questions or information.