Hello Stackers,
Me again.. back with a little guide on how I find niches to use for content locking. The best offers in content locking with the biggest payouts are French offers, heck, you can get leads with $25 payouts over at AWM or CPAGrip. This method is actually quite simple yet very effective.
YouTube
What I do is go over to YouTube and add: (Grauit) which translates as (Free) in FR. You will see a bunch of suggestions popup, change the filter over to (most viewed) and then scroll down the page.
Straight away I spot:
- [TUTO] Avoir Minecraft Gratuit | Cracker MineCraft | FR | [HD
- Subway Surfers | Jeux gratuit | Play Store/Apple store | Courez courez vous m'attraperez pas !! :P
- WiFi gratuit FreeWiFi Secure (EAP-SIM) tuto
- Hack Kamas Dofus | Kamas Gratuit
- Comment Avoir des Crédits Habbo Gratuit
With a bit of inspection using the likes of: App Annie I spot something:

The game (Subway Surfers) is ranking pretty well at #14, common sense tells me that game will be a good niche to consider targeting. But, something else catches my eye too: Comment Avoir des Coins FIFA 15 Gratuit = how to get free Fifa 2015 coins which IMO would be worth looking at, Fifa is a HUGE game and given the right spin you can bank some big money from it.
Tip - Right click and view source when on the video page, then, look for the keywords they have used.
Example: <meta name="keywords" content="Comment, Avoir, des, Coins, FIFA 15, Gratuit"> 
Facebook
FB can be used to find niches too using the same exact method, in fact, I just did this and found an AWESOME niche... it's not unheard of by all means but it's something I bet is making someone a LOT of money right now, hint: Regarder film gratuit = watch free movies, I found a page on FB just now that can be replicated and used, heck, imagine the money you can make by offering up movies when the payouts can earn you $25 PER LEAD. I'm not going to post the guys page on here out of respect for his privacy, well, I can't chew your food when I'm spoon feeding you at the same time, right! 
Final notes - if you have a moral obligation when it comes to content locking due to it being linked with BH and such, you can EASILY convert them into WH niches and just actually give the end user something of value, just like I explained already on my other thread: INCENTIVE content locking: unethical, dirty, wrong?. How I turn BH niches into WH I hope that helps out some of you anyway, I'll be on here sharing stuff as I like this forum. Open your eyes and start stacking some money.
Great ideas.. I can use some of this for building email list leads 