[Closed] Volkswagen radio ad

Dunno if you've heard it, but it's one of those voice-overs with a famous personality drawing attention to the product being sold. The only thing special about this one is that it is the "voice" of Prof Stephen Hawking. Now, that got me to wondering - did they actually pay him to do the ad or not? I guess other famous voices have, over the years, been done by impersonators, but this one seems a bit cheeky if so.

As it turns out they've simply synthesised a voice to sound like the voice we associate with Hawking.

A bit cheeky then - or morally suspect?