"copy and profit" is a great technique to start with. I don't advocate copying people's ads and LPs, but you should at least look at what's working and use that as a starting point.
When you're starting out, you have NO idea what works and what doesn't, but you'll think you do. Instead of trying and failing, just try things you know are working already.
Besides, legit or not, the keywords the product lists will be worthless by now. Free information about keywords is available all over the place.
The Art of Keywords