The online pharmacies aren't licensed by the US (from the article "Google knowingly accepted ads from online pharmacies, based in Canada and elsewhere..."), so the US can't revoke their licenses. The laboratory that sells to these legitimate pharmacies, licensed in their own countries, isn't doing anything illegal. This leaves Google as the only part of this chain that the US can punish.

Science is like Linux: It's complicated, but if you want to put in the time and energy to learn it, you can understand it and make changes. Religion is like Apple: It's simple, but you will never understand or change the decisions the leaders make for you.