I think Sinamex has explained their side of the story sufficiently. I think I can accept it.
However, I saw Remix mag's site and quoting from them:
"By far the nicest surprise on the iControl is the MIDI Input, which has been basically unadvertised. It's pretty much a free one-input MIDI interface for your Mac. Connect a MIDI synthesizer or other device from its MIDI Out to the iControl's MIDI In, and the Mac will recognize the device. The iControl does not manipulate the device in any way; it simply passes through the signal. I tested this with Ableton Live 4, which recognized the iControl MIDI In with no problem."
Unless I misunderstood, what it says is simply that iControl provides a midi in for an external midi device. That means - connect an external midi device via iControl and other apps like Ableton will recognise that midi device as midi in. It simply acts as a conduit, iControl doesn't control anything. iControl does nothing else in Ableton live and is hardly a controller for it. So M-audio's point stands - iControl is ONLY for Garageband.
Well, in this case, it sounds like the buyer did not really ask Sinamex the questions - from Sinamex's point of view. My suggestion is still the same: do proper and thorough research on a product before buying it. Before I take the plunge, I usually take at least a few weeks to months to decide. If the manufacturer isn't clear on one point, I would communicate directly with the manufacturer. Any product that's fresh/new out in the market, I usually stay away from them until enough users have given their comments in forums.