Blamads is great for content locking and incentivising offers.

Personally I would use it sparingly and definitely not on the home page (you're simply going to turn viewers away without giving them any incentive to continue) use it for a specific reason, to offer a free guide, a post that "reveals all" there needs to be some sort of need for the viewer to fill in that offer right now, you need to pre-sell and tempt them so that when the content locker does appear they don't even question it and simply fill it in to get to the good stuff.

You shouldn't use content-locking on a page that itself promotes a CPA offer.
Content locking is for quality content, so I'd choose one or the other and not combine the two.

If you have a gaming site, lock access to the games themselves (all or some). If you have lots of return visitors, set it up to where they can play a game or two with no locking, and then the gateway appears after the third play, or something similar to that.

I also would try more than one content-locking network to compare results