As one of the other comments has already touched on. You did not actually test smiling faces vs non-smiling faces as both the landing pages are very different in more than just one element.
Also, from my experience your industry to better suited to different types of tests such as the value proposition and the selling of the benefits rather than the features of your product.
Answer the visitors need/desire and they will sign up
I run a Conversion Rate Optimisation Agency and would be happy to help you design a new landing page to test as part of a free consultancy, in return for a review/testimonial of our work.
What do you mean by "hobby site"? A site covering a specific hobby or something else? Can you tell more about how you earn money (memberships, advertisements, something else)?
Things that people do outside of work like mountain biking, yoga, paintball, cooking, whatever. There is lots of opportunity for ad revenue and affiliate links
On the beginning the monthly fee will be required to reinvest the money into promotion and outreach. When the performance fee will get big enough, it won't be really necessary.
I have two sites I wrote in Go that have hand coded templates. I am thinking about moving more in this direction. I have gotten a bit frustrated with WordPress lately as I cannot get the level of control I would prefer to have.
If you drop me an email to: david@blogoptimisation.com
Let me know your Wordpress Site URL that you would like me to take a look at.
I will then perform an audit for you and identify how much I can do to help you and I can then provide you with a list of changes to make to speed up the site.... Or I can go in and do the optimisations for you if easier..
Cool. Try warrior forum.com for your testimonials. Once you have the testimonials you could sell it as a wso (their marketplace). A big market there for this as Wordpress is popular. Although those people expect a big hyped up sales page to convince them to buy!
Also, from my experience your industry to better suited to different types of tests such as the value proposition and the selling of the benefits rather than the features of your product.
Answer the visitors need/desire and they will sign up