My Muslim coworker would buy non-alcoholic beer for her husband to drink with his friends, and they seemed to like it. Of course the people who drank alcoholic beer said that it tasted pretty shitty, but then again they weren't really the target market. I think the Muslim men drank it in this instance partly because Australia has a very prevalent drinking culture, so if you don't drink you're not seen as 'manly' or that there is something 'wrong' with you. This is a way for them to drink and be MEN, but not break the rules of their religion. Seemed pretty simple enough to understand.
However I can think of another reason why these may exist. Have you guys ever thought about people who want to drink but aren't allowed to? There could be health reason that mean they can't drink (my friend has a salicylate intolerance so alcohol affects her quite badly and therefore doesn't drink) but like the taste of wine/beer/whatever and still want it. Also it could be a way for alcoholics to try and wean themselves off alcohol, like people who smoke electric cigarettes to quit smoking. In those instances and probably more that I can't think of off the top of my head, these things seem like a good alternative.
As someone who is related to an alcoholic and know a number of people who don't drink, the recent reactions I have seen people having around here about people who don't drink is frustrating. There are a multitude of reasons that people don't want to drink, and just because you feel the need to fuel yourself with your poison of choice doesn't mean you should be so judgemental of people who don't want to. My brother doesn't drink because he doesn't like being out of control of his actions. I didn't drink for a long time because I was worried I would end up like my dad. How do you think we feel when people go "Oh my god, how can you not drink? It's the best! Go on, just try this! Look I'll buy you a real drink, it's ok!" around us?
I am kinda offended by the mindset of "what's the point" that's going on in this thread. There's no need to act so high and mighty over drinking.