u/mamafrog7

I'm on 3.12.71 on Android, and if I was taking too long to solve a puzzle, a lightbulb would appear with an arrow. I clicked on it and it went to an advertisement, after which I was returned and given the letter in the lightbulb square.

I'm not on any teams, so I don't know the team hint mechanism, but I'm kind of surprised not to see this new development in gameplay mentioned anywhere.