Saw a tweet the other day. Walmart is a true behemouth; and they spend on R&D (anecdotally, have met some great data scientists from Walmart Labs).

For perspective:

Walmart makes ~58.7m an hour

Amazon / Macy’s / Best Buy / Sears / Target / Gap / Big Lots/ Kohl’s / J.C. Penney / Nordstrom / Dollar Tree / Barnes & Noble / Bed Bath & Beyond

... make ~57.3m/hr combined