This is a very catchy phrase that likely refers to the annual increase of something that is both frequent and tempting or addictive.
Without knowing the exact context of the “reactions” (which point to social media), there are two common interpretations that fit particularly well:
- 🎄 Christmas cookies, food & decorations
This is the most likely interpretation, as the phrase implies the annual repetition (“year after year”) and the “addiction” (to sweets or consumption).
Double the amount, double the addiction: Every year, we bake or buy twice as many cookies or sweets, prepare twice as much festive food, and indulge in twice the addiction to sugar, enjoyment, or consumption.
It describes the ever-increasing excess and allure of the holidays (Christmas/Advent).
- 📱 Technology & Social Media
If the reactions to social media are significant, it could refer to the escalation of digital habits.
Double the amount (content/data): Every year we consume twice as much content, data, or news.
Double the addiction: Our dependence on smartphones, apps, and the constant availability of information is steadily increasing.
Which interpretation fits the context in which you found the sentence better?