Groupon’s popular promotional voucher business model has struggled to stay relevant in these changing times, and even though it once pulled in funding of close to a billion dollars, it’s just not making waves like it used to do. Faced with that challenge, Groupon has transformed itself into an alternative listings directory. What’s really great about Groupon now is that it’s still selling its cost-saving coupons together with its comprehensive listings. Just search for whatever it is you need, and you can save some cash when you find it on the site. Take a look at the discount on offer…