Noah Dinkin found out that Starbucks mines Bitcoin while you’re connected to their free WiFi. In Dinkins tweet he addressed that this kind of free WiFi service is a “little off-brand” and also that the store in Buenos Aires was not the only store doing this and in-fact that there was three separate stores which Dinkins went to that all did the same thing.
This may seem suspicious but Starbucks claims that this is not their fault and blame should be turned to their internet providing companies, this is what they told Motherboard
“Last week, we were alerted to the issue and we reached out to our internet service provider – the wi-fi is not run by Starbucks, it’s not something we own or control,…”
Starbucks ended up responding to Dinkins tweet saying that they have taken “swift action” into resolving the problem with their ISP and that customers will be able to join the free WiFi network safely.
How to prevent this?
Block external scripts or/and the coin-hive.com domain with your Adblocker such as uBlock (for scripts uMatrix). Ensure you used the filter list which includes crypto-mining pages. Some VPN providers already blocking such mining domains automatically when you’r connected behind the VPN.