It is possible to design products that reduce the spread of misinformation, but doing so effectively requires quantitative metrics to test the impact of each tweak.
There is no good public data set for WhatsApp, making it hard to know if this will be effective. https://twitter.com/techmeme/status/1087346843678359552
When someone can get as many phone numbers they want, and mine the phone numbers of users via invite links posted on the web, to forward as many messages they want, only normal users are affected by this new WhatsApp decision.
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