Everyone's traffic is different. These type of questions cannot be answered by anyone but yourself. They might work on your traffic but not on other's. For example, if you have 40 yr old men as your traffic, you can probably be successful content locking penis pills .. but will that have ANY chance of working with 14 year old girls? Would a Justin Beiber email submit convert w/ 14 year old girls? Yes. What about 25 year old men? Not really.
Everyone has different traffic and everyone's traffic will convert differently with different offers.