Why do shipments placed via eBay ship faster than shipments placed via COMC?

Domestic eBay buyers pay an additional premium of approximately 15% or more for rushed packaging of their orders, as eBay requires us to ship packages within their specified timeframe. Customers shopping directly on COMC have the option of selecting a more affordable shipping service in exchange for a longer packaging timeframe. If you would to take advantage of the same shipping options that are available to our domestic eBay customers, simply select one of our Rushed shipping options.