They just have good advertising strategies.
That, combined with high-quality firearms will get you on the cover of plenty of magazines. I am highly biased, because I LOVE both of my Para-Ordnance LDA's, but I think they have some of the best handguns on the market, and they are constantly coming up with new ideas.
You want a single-stack, single-action, Government Model? Para makes 'em.
You want that pistol in double-action? high-capacity? Officer size? Commander size? Para makes them, too.
You want an 18 round, 5" barreled, double-action 1911, chambered in 9mm? Yep, Para's got you covered.
You want a 10-round, 3" bbl, single-action .45 ACP 1911, with night sights and a rail? Hey, meet the NightHawg.
Now you want it in 9mm, with a 12-round mag? Para 9 anyone?
Face it, they make a lot of guns, based on a tried and true system; some models of which have been seriously tweaked, and they've been used quite successfully in high-level competition. Are they inexpensive? That depends on your budget, I suppose. (They are not inexpensive to me.) But, they aren't the most expensive, either. Not by a long shot. They make a great product, and they know how to get their name out there. Nothing wrong with that in my book. In fact, it sounds like good business sense.