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真的是非常标准的 email marketing 的 opt in process，有兴趣的可以照着学一下
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, C; o, n1 H9 H; }9 m, z( }6 U- http://www.marinsoftware.com/resources/whitepapers/mobile-advertising-around-the-globe-2015-annual-report?trackid=70150000000pC66AAE&utm_source=sej&utm_medium=email&utm_campaign=2015MobileReport
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发表于 2015-4-22 06:43:43
发表于 2015-4-22 12:29:58
发表于 2016-12-8 14:02:06
