Since we looked at the Walmart Marketplace in August 1,000 new sellers have been joining the marketplace every month. Since August the marketplace has doubled in size to now have more than 4,000 sellers.

Not only that, but since August active sellers - sellers who went beyond joining the marketplace and had sales - have doubled too. There are 1,000 active sellers on the Walmart marketplace already.

More than 10 million products are on offer from the marketplace sellers alone, on top of what is already available on Walmart.com

In an invenstor call a few weeks ago Walmart said that they intend to invest billions into online expansion, while cutting down new store openings. This sounds like a good opportunity for brands to ride the wave of Walmart focus on ecommerce in a yet not too competitive marketplace.

When we started covering Walmart in May there were 500 sellers and only 200 active sellers. Today it is still much smaller than Amazon.com, but continues to grow at a healthy pace.