How many Bitcoins were actually paid to the WannaCry authors so far?
wolfmankurd.github.io
wolfmankurd.github.io
* https://blockchain.info/address/13AM4VW2dhxYgXeQepoHkHSQuy6N...
* https://blockchain.info/address/12t9YDPgwueZ9NyMgw519p7AA8is...
* https://blockchain.info/address/115p7UMMngoj1pMvkpHijcRdfJNX...
Roughly 47 BTC (~100,000 $) were paid by a total of ~310 users. There have been 300,000 infected PCs reported [1]. If we asume that a payment is done per machine (at least thats what the WannaCry 'rules' demand), than only 0,1% of infected users pay.
Seems, crime does not pay (at least it does not pay as much as expected) ;-)
[1] www.telegraph.co.uk/news/2017/05/13/nhs-cyber-attack-everything-need-know-biggest-ransomware-offensive/