Auctions work because settlement is handled by someone both sides trust. That part is genuinely valuable and worth preserving. What is less valuable is everything bolted to it: the fixed date, the drive, the ramps and trailers, the auctioneer's calendar rather than yours.
Online livestock auctions have existed in South Africa for years and accelerated during the pandemic, but most inherited the same constraint — they still run at a set time. Miss it and you miss the market.
Yalla keeps the settlement and drops the clock. Open at two in the morning, open on a Sunday, open the moment the rain keeps you off the lands and you finally have an hour to look at what is for sale.