I'll give you a lil' love here, i'd rather help ppl like you who are at least brave enough to show your shit and ask for some over all opinions.
First two, just consider them practice - looooong practice.
Last one, my boy actually runs that, if you want personalized help I can intro you - he may/may not be willing to help but over all the e4e product has long since past it's peak. You are just a bit late to the game for that one, even for long tails, most of the bigger guys have milked it/moved on, and the smaller grass roots guys like yourself have saturated the shit out of the niche. *For those that don't think it converts, he's cleared 7 fig, was #3 on the whole CB marketplace (out of 45K products) and spawned a whole array of copycats, in the xxx range - feel free to call him an ebook retard anytime.
I'd suggest you repeat your last site, this time on a NEW product. Go to the marketplace and look for products that have a spotlight link, click it, look at their graph (or just go to cb-analytics.com or cbengine.com, and look at biggest gravity gains). Choose something that's been on the market for less than a year (or newer the better), is between 50-150 gravity, and most importantly is NOT on a downward trend but is in a healthy rise. AND do not choose any makemoneyonline stuff if you're a noob, just trust me on that for now.
Above and beyond that, I preach to get 100-200 targeted unigues through your lander to your vendors sales page a day, and a weeks time tweaking. If you still can't get it to convert - move on test something else. OR just test 2-3 at the same time so you can find a winner faster. When you do, put the others to the side and scale on the winner faster than you ever have.
Shitty that it took you so long, but I'm telling you now that last one was as close as you're going to get for now so repeat that. Work on the copy a bit, choose a newer product set, and hammer the uniques at it I bet you'll crack your first sale within a week or two if you take action on the shit above.
N.