1. You mentioned thousands of other things in your private conversations. They suddenly start to narrow down on one specific one.
2. You're interested in photography, and are using service made to share photos. You follow photography accounts/search on the internet for photography related content, this signal got picked up, you clicked on some ad (by mistake most likely), and signal got amplified.
What's more likely?
1. You mentioned thousands of other things in your private conversations. They suddenly start to narrow down on one specific one. 2. You're interested in photography, and are using service made to share photos. You follow photography accounts/search on the internet for photography related content, this signal got picked up, you clicked on some ad (by mistake most likely), and signal got amplified.