'Do not track' probably won't spell doom for online advertisers. But it will put the burden on them to explain to consumers what targeted advertising is and why it's good for them. They'll have to come out of the shadows; they'll have to be honest with people. What a radical concept. I'm all for it.

PayPal, which was founded in 1998, may be the closest thing to a global currency that has ever been created. Based in San Jose, California, the company operates in 190 markets, sending and receiving payments in 24 currencies on behalf of 90 million active members.

PayPal claims it can help merchants expand into international markets; its system makes it easier to do business with customers in multiple countries, for example, by handling tricky stuff like currency conversions automatically.

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