It’s so obvious it’s a scam too because of how vague some of the “challenges” are. “Click all the squares that contain a bike” and then you do it in every conceivable way AND IT STILL WONT ACCEPT YOUR SUBMISSION. Stupid
I have a suspicion that it might depend on a few factors that might be related to Google’s ability to track, such as the browsers you use and whether you’re on VPN. I saw a post on Lemmy the other day (can’t remember where) that they suspect captcha is more annoying on Firefox, whereas fine with Chrominum-based browsers, esp Google Chrome. I think I sometimes experienced this as well, but I didn’t keep track.
Here's the thing about all search engines that aren't Google (including the ones "based" on Google results). They all suck for regional results in many non-Latin languages.
I had one today where it was click on all the squares that contain a bus. One square very clearly contained a truck, not a bus. When I didn't select that square, it told me I was wrong.