As a user who's constantly clicking on the crosswalk or storefront images you can't help but to think that you're essentially working for free training Google's machine learning models by providing them with supervised data points.
I've been thinking about this a lot lately. Where is our compensation? It's our time and brain power training Google's AI that will one day be sold back to us. I'm really not into this.
disclaimer: work for google, nothing related to reCAPTCHA though. opinions are my own, etc.