solutionoferror.com
They show you a question, and to get the answer, you need to view an offer. You don't need to click on it, there is a "skip" button, but they are hiding other sites behind their offers, so they get money for sending you away from their site.
Working from my previous answer (https://meta.stackexchange.com/a/120770/152620), I googled:
TypeError: unbound method can_move() must be called with O_shape
The first result was Stack Overflow (Python: Display Shape from Tetris GamePython: Display Shape from Tetris Game), but the second was to that site:
http://www.solutionoferror.com/python/python-display-shape-from-tetris-game-77409.asp
Clicking "get complete solution" will bring you to an offer, clicking "skip offer" will then bring you to Stack Overflow.
P.S. I noticed that the questions on that site don't all go to Stack Overflow, they go to lots of different Q&A and forum sites :(