Why? First of all, why must there be a dichotomy here? Second, why must I give each site my credit card number directly? Why can't we do that differently? The

Why? First of all, why must there be a dichotomy here? Second, why must I give each site my credit card number directly? Why can't we do that differently? The conventional wisdom is that ads are more convenient. I hope that, sooner or later, this will stop being true and we'll have a variety of better ways of supporting content.