It looks like a completely legit company/page. Unless you plan to reverse their customer base I'm not sure what you would like to know. I'm guessing they either had another page, possibly a website, or something of the sort, because the way they interact with their customers, I don't see anything fishy here. They probably ran a good advertising campaign to begin with and have attracted new customers and people through their products. You could Google the company though, and see where they're buying adspace and stuff, it might just be that niche isn't terribly saturated. I didn't actually do any looking around on the company but the way their very first post took off leads me to believe they already had a "following" or reputation of some kind and it's grown from there. Possibly they have their website ranked on page 1 of Google or Bing or something too. If I had to guess I'd say they were just late to making a Facebook page for their company.