Indeed, it's a calculated risk. Generally, I consider "landing page(s)" anything that's public-facing and doesn't require a sign-up to be viewed. I aim to satisfy, so I'm more than happy to put in more time and meet a client's expectations even if it means a bit of bending over backwards on my part. If pricing needs to be adjusted in the future, it will.
In general, I won't take credit for any copy I write -- unless, of course, someone would like to provide a testimonial.
As for attracting clients, that remains to be seen. Hacker News is the first stop on the PR parade, the rest is uncharted territory. One thing that comes to mind is advertising on a few weekly podcasts. We'll see.
Thanks!