I tried to downvote your comment for making unsubstantiated claims like "The (vast) majority of people don't engage with these tools". But was unable to because I don't have enough karma. Do with that what you please.
It's possible, if that image has a startup script to fetch the .apk from a third party source & install it. I've put custom/specialty ROMs on old Android devices in the past and they often come with random apps I don't need and uninstall on first boot.
I think the biggest problem with Yelp is fake reviews intended to harm a business either from competition or disgruntled ex-employees. They allow 1-star reviews from throwaway accounts to stay on the front page and filter 5 star reviews from active users unless you pay for their service which includes 'account management support' to dispute fake reviews.