But they said the effect of the rules will be to seriously degrade the functionality of the apps for U.S. consumers. Users will experience slow speeds to the point of timing out, so while the service might still be technically usable, it won't be very functional after Sunday night, officials said.
https://www.wsj.com/articles/commerce-secretary-wilbur-ross-says-he-will-ban-wechat-use-in-u-s-after-sunday-night-11600429988