This page is riddled with typos, grammar mistakes, and little bits of weirdness in the copy that immediately makes me distrust the service (or rather, makes me think that it's a scam). Even the HN submission title ("...affect ur retention. Free. in your...") is so blatantly wrong that I almost think this is a troll.

On the off-chance that it's not a troll, it's definitely worth your time/expense to have a native speaker (I'm assuming English isn't your native language, or one in which you've done much reading or writing) go over the text.