Wroupon is a rebranding of the Sopantech script. I bought the Sopantech script in June but it had some issues so I pivoted and bought Agriya's GrouponPro and used that to build a couple of groupon clones for clients. In my opinion GrouponPro (or whatever it's called now that Agriya rebranded it last month) is the best script out there. But there are many to choose from so YMMV. The downside of going with Agriya is once you install it, it's very difficult to upgrade (in the event more bugfixes get released). In the early days of Agriya's GrouponPro there were several critical bugs to deal with - but now the product is fairly mature and stable. There's a lot to consider when building one of these sites. To do one well you have to know how to completely redesign the default templates, including the HTML email templates - otherwise the user experience and branding will fail. I'm an expert in HTML, CSS and PHP so for me it wasn't a problem but most groupon clones look sophomoric. So my advice is, find someone who knows what they're doing w.r.t. interface design before you leap into this "turnkey" technology. It's true what the Yipit guys say about the technology being easily master-able but keep in mind you still need to know what you are doing. Feel free to reach out to me if you are considering one of these businesses and have questions to ask. You can save yourself a lot of time and money if you ask the right questions. Also... The hardest problem for most of these sites is "How do I build a huge list of opt-in email subscribers?" If you know how to do that (and I mean launch with 10k opt-in subscribers) AND you're well funded, then you could stand to make a ton of cash in the business. If you don't know how you're going to get thousands of email subscribers there are still ways of making the business work, you just have to have enough runway to wait out the early days of few sales. Everyone in the industry is working on their email product, so don't get too distracted by site designs -- that's important but it's only part of the plan. And we haven't even gotten started talking about merchant agreements, writers, legal, taxes, margins, merchant training/support materials etc. By the way, some of the best discussion about groupon and its clones right now is over on quora.com. The yipit blog is second, and then there are the back channels...
$6 billion Google offered Groupon -- and Groupon turned it down. Wow.
Speaking of wow... Check out wow.com. I like a lot of what I'm seeing from them. Apart from the design of course. Notice how they don't advertise how many people 'have already purchased this deal' - or at least they didn't in the beginning. Check out the deals - they're unbelievably good, always, with simple yet clever writing. Wow is the Wal-Mart of the daily deal space.
Regarding aggregators... Aggregators are like adding jet fuel to your company, obviously, so leverage that source of incoming traffic. In order to do that though you need to have built something beautiful. Aggregators are not going to showcase your deals if you provide a janky experience or your deals stink. A lot of daily deal sites don't seem to have given any thought to what the aggregators are looking for. In short, the end-to-end user experience needs to be solid. Some of the daily deal sites I've seen are designed all wrong. Oh and you also need to sign up for a couple of affiliate programs. And introduce yourself to Yipit, and the others. It's a whole lotta work to go from "turnkey" to launch. BUT if you've conceived of some twist on the groupon model and can articulate your business design into english, and can afford a smokin designer-developer for a few weeks... and do all the other things right, then you could stand to take a lot of market share. Female college grads, 25-35 love their daily deals. Corollary to that: don't target men - men don't buy coupons.
One last thing: Ideally you would just build the site in Rails or Django or Drupal... The trouble with doing that is this: You're starting from scratch whereas all these Indian companies have been hustling in teams for (in some cases) over a year. There are some advantages to going with a "turnkey" solution, just know what you're getting and what you're giving up.
Peace -