Are there websites where I can do simple tasks like distinguishing/sorting images, writing captions, selecting correct options or other tasks I can do in my free time or mindlessly whilst also contributing to meaningful projects? Something like Google Crowdsource, although I would like to avoid registering to any privacy invading services asking for my personal info in order to contribute.
OSM is perfect for this. If you want a wider range of prompts, and you have an Android device, you can use https://streetcomplete.app/ - it turns every missing data point into a “quest” and gamifies it. It’s really addictive when you get into it. :)
Actually, the link I shared was info from Streetcomplete. This app is the reason I went back to Android, such an amazing project!