Which consumer psychology principle has most influenced the recent shift in mathematical software pricing models from one-time purchases to subscription-based services?

The educational mathematics software industry has evolved significantly in recent years, adapting to changing consumer preferences and learning styles. Companies in this space must understand market positioning and consumer psychology to effectively reach their target audiences. This poll tests your knowledge about how mathematical software companies have responded to shifting consumer trends in educational technology.

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Loss aversion - consumers prefer small recurring payments over large one-time costs, perceiving less financial risk
Paradox of choice - reducing purchase options to a single subscription model simplifies decision-making
Social proof - subscription models create communities where users can share progress, increasing perceived value
Anchoring effect - subscriptions appear more valuable when compared to the previously higher one-time purchase prices