Look at the big brain on Brad.
I am a smart......
Maryland residents were always supposed to pay sales taxes on purchases from Amazon - they just weren't doing it (and MD wasn't alone in that).
Amazon created 1,000 jobs jobs with that distribution center and are now able to better serve the DC-Baltimore Metropolitan area with same day delivery. If the pattern holds, you'll be getting Amazon Fresh very soon as well.
This is a win-win and has been Amazon's MO in over half the states who came knocking on Amazon's door for tax remittances. The other half didn't get a distribution center or the jobs that come with it.