Which point-of-sale innovation has been most widely adopted by religious bookstores in the past decade to compete with online retailers?

Religious bookstores and spiritual product retailers have undergone significant transformations in recent decades. With the rise of digital content and changing consumer preferences, these specialized retailers have had to innovate to remain relevant. This trivia question explores an interesting aspect of how religious product retailers have evolved their point-of-sale systems to better serve their communities and survive in an increasingly digital marketplace.

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Integrated inventory systems that connect physical stores with online catalogs, allowing customers to order rare religious texts for in-store pickup
Blockchain-based payment systems that allow anonymous purchases of controversial religious materials
Subscription-based rental programs for religious texts, similar to early Netflix DVD models
AI-powered recommendation kiosks that scan customers' faces to determine their spiritual needs