Google Ads now with Optin Boxes?

That's right, an optin box right within the Google ad.
I wonder what sort of conversions they would be seeing?
Does anybody know if this is open to all advertisers or only the 'big' spenders at the moment?
Interesting concept nonetheless...
Wibble, bark, my old man's a mushroom etc...
Wibble, bark, my old man's a mushroom etc...
**No Opt In Required**