TikTok's Chinese owner, Bytedance, understandably refused to part with the prized formula, and Beijing backed the firm.
But in a twist few saw coming, China's top cybersecurity regulator has signalled that Beijing may allow ByteDance to license the algorithm and other intellectual property (IP) to a US company owner. But it will not be transferred outright.
It's a major departure from China's previous hardline stance over the algorithm.
But there's every chance the US version will run on a "stripped-down" version of the app's software, said computing expert Kokil Jaidka from the National University of Singapore.
Even limited access could reveal how the technology drives engagement, moderation and ad targeting - all the things that make the app so profitable, she adds.
"It simply doesn't make business sense for ByteDance to hand over its most valuable asset when a lighter version can keep the app running without giving away its edge."
But these changes will affect the user experience - the app may show less diverse content than users might see elsewhere, Dr Jaidka adds.
"A lighter, slower, more domestic version - while ByteDance keeps the crown jewels in Beijing."



