When looking at the largest US ecommerce sites, eBay is a distant second to Amazon. But as third-party sellers become more prominent on Amazon’s marketplace, many want to expand to other platforms, a possible silver lining for eBay.

While a gap in ecommerce adoption between retailers and brand manufacturers used to be quite prevalent, it’s now common practice for brands to sell online, a trend that will continue to increase in 2019.

Online retail sales—outside of the top 10 companies analyzed—will see a decline in ecommerce sales growth, by roughly 3.8% this year, according to a new eMarketer forecast.