Could someone share his/her niche site/fb/tw

Could someone please provide me his/her website/fb page or twitter . I cant understand how you convince people to complete offers like
1. Biz opps/work at home
2. Coupons/daily deals
3. Dating
4. Email & zip submits
5. Free trials
6. Downloads
7. Financial
8. Free stuff
9. Gaming
10. Surveys
11. Sweepstakes
I mean why someone should compete this offers without getting anything.
Please share you site / fb page/twitter here or on pm.
I will highly appreciated.