Before youtube disabled recommendation for people with watch history turned off, having watch history turned off made it so your recommendations were only based on channels you are subscribed to and possibly videos you’ve liked, commented on, …

There are some categories where I only ever search for the category, then watch a video, but never subscribe to any channel. Those videos were never recommended to me. Meanwhile on my girlfriends pc with watch history turned on, as soon as I watch a single video from a channel she’s not subscribed to similar videos appear all over the front page.

Every Rubik’s Cube, no matter how scrambled, can be solved in at most 20 rotations.

Many of the keys sold on key reselling sites are bought with stolen credit cards. It usually works like this:

1. Someone obtains stolen credit card data (can be easily bought on the dark web)
2. The stolen credit card data is used to buy keys from official key sellers (or directly from the developer of they offer them)
3. Those keys are then sold on key reselling sites
4. The credit card owner notices that his credit card data was stolen, contacts his credit card company and does a charge back. 5.The official key seller has to pay back the money + a charge back fee.

Parking lots

Wow. Now you can finally build realistic American cities ;)