eBay wants reliable operations, and people who can operate at the bare minimum in pricing and still profit for future business so eBays' business model can continue. Small sellers can't do this.
in 2020, eBay will completely transform into a large product search engine connecting people to the lowest priced items from various distributors and retailers, and decline into financial collapse and become a ghost site before being sold to Google. Niche sites will become larger, as eBay categories will branch out and capture the traffic and they will grow. (Etsy being for handmade goods, soon there will be DigiGiant (made that up) for people to buy/sell used electronics, GamerGamer being the site to buy and sell video games, Gold88 - A collectibles buying and selling platform, etc - the only "Mega eCom" will be Amazon.
Investors seriously jump into whatever is growing in eCommerce at the moment, especially because most wouldn't touch anything that would compete against eBay 3-4 years ago, but Bonanza was kind of like "this is interesting" and pretty much died, and then Etsy came along being more categorized and more specific, became successful, and investors said "this could work" and Etsy earned over 40mil like it was nothing.