Walmart.com has much higher sales than Jet. It already is huge online, even if it's not Amazon huge. If anything, this is about pruning competition and buying potentially useful IP.
are your serious?
Walmart's revenue was $482.1[0] billion in 2015 and amazon's was $107b[1]
[0] - https://www.google.com/webhp?sourceid=chrome-instant&ion=1&e...
[1] - https://www.google.com/webhp?sourceid=chrome-instant&ion=1&e...
edit - sorry, i missed the .com part