Overall the idea works because Google embraced people using their product in a unique way, poked fun at itself, created a unique “easter egg” that will be passed along viraly and ultimately looks
like a can-do type of organization unafraid of risks. Most of us who work in the business would cringe at the approval process one might go through to get an idea like this to happen. “Did legal
see this? Does everyone have a release? Is that another brand in the background?”
A novel experience - getting a free caricature drawing and finding an ad on it. Personally I would keep it and I think from an experiential point of view it’s worthwhile, but to me it seems like the cost of each engagement might be a bit high. Especially if you have people outside of the target market asking to be drawn, and you must be polite, you’re talking only a handful of people per hour that you’re reaching. And if it’s indeed a surprise you’re giving people - I see no branding other than in the reveal of the drawings - then you miss what most experiences seek to accomplish when only letting a select few participate: engage the audience and let them in on the secret.