Which e-commerce innovation had the most significant impact on making rare religious texts widely accessible to scholars and practitioners worldwide?

E-commerce has transformed how we access religious and philosophical resources. From ancient texts and artifacts to modern spiritual tools, online retailers have created specialized marketplaces for seekers of wisdom and faith. This poll explores an interesting development in the intersection of commerce and spirituality - can you identify which major e-commerce innovation specifically revolutionized access to religious materials?

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Amazon's Kindle Direct Publishing, allowing self-publication of religious commentaries and translations previously controlled by established publishing houses
eBay's authentication system for verified religious artifacts and antiquities
Alibaba's specialized marketplace for bulk ordering of religious ceremonial supplies
Etsy's artisan network for handcrafted religious icons and symbolic items