Which pricing strategy, implemented in the 1970s, revolutionized the telescope market by making amateur astronomy more accessible?

The astronomy retail market has evolved dramatically in recent decades, with telescopes becoming more accessible to amateur astronomers. One particular pricing strategy revolutionized how telescopes were marketed to consumers, dramatically expanding the hobby astronomy market. Test your knowledge about this significant shift in astronomical product marketing that changed how we look at the night sky.

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Dobsonian Revolution: simplified design at drastically reduced prices
Premium Tiering: creating luxury telescope lines with gold-plated components
Subscription Model: monthly payments for telescope upgrades
Bundling Strategy: including expensive eyepieces with every purchase