I don't know if they'll do it again sometime, but occasionally they'll do a promotion to get a sample pack. A year or so they did this, but it was available to UK (drynites) customers only. Just check back every so often, with their website. They might do it again.
I think Goodnites did this last year, but there were sent to moms in return for the mom to post a blog review of them. Not sure if they had on their site how to get the sample; or if they contacted people doing blogs.
(Sorry in advance for bad grammar, I'm on my mobile.)