Should Apple buy Groupon? Or build its own?

I look at the numbers and new specs and features Apple announced today, along with what we already know, including:

• 200 million plus iOS users
• 200 million plus iTunes accounts/with identity and payments
• auto-payments
• subscriptions
• iAd advertising
• FaceTime -- between iOS users
• Find My Friend -- between iOS users
• Siri technology -- get me the best price on X

Okay. just writing out loud here, and obviously I was going to say, should Apple buy Groupon for daily group deals, or buy its own? Except, now I'm thinking, shit, maybe Apple should just buy, say, the Alibaba platform and create a giant global store that offers the best products, the best prices *exclusively* to iOS users.