This is catastrophic for anonymous credential systems, since a single stolen credential anywhere means that the guarantees of the global system become useless.
Pretty coloured eggs from fancy breeds can now cost as much as £4.50 for half a dozen. But some people have found a sneaky way to avoid paying a premium
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相比之下，订阅制更强调稳定性。平台通过会员商家、优选商家或服务包的形式，为供给侧提供相对确定的曝光、规则与订单预期。其价值不在于单笔交易的利润最大化，而在于将不确定的交易收入，转化为可预测的现金流。在竞争趋稳的环境中，确定性本身开始成为一种可定价的商品。
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