"The algorithm" could mean a lot of things. Whatever it means, it probably spans hundreds or even thousands of services. That doesn't mean it cannot be made ope

"The algorithm" could mean a lot of things. Whatever it means, it probably spans hundreds or even thousands of services. That doesn't mean it cannot be made open-source. I imagine they'd probably start with documentation and white-papers that communicate "here's how we intend for it to work". It's seriously unlikely anyone in Twitter knows actually works how any non-trivial algorithm in the company works. To figure THAT out, they could decide to do a company-wide documentation and instrumentation push like they probably would've had to do for GDPR anyway, which is painful and boring and going to take a very long time. Failing that, they could just say 'the algorithm as it stands is no longer fit for purpose, given part of its core requirement has become that it needs to be transparent and publishable, and presumably legible. We need to make a new one. Publish the core algorithm. We probably won't deploy it in that exact state, it's going to span multi-services and so on, you obviously don't get the data we used to train the models, but we will work backwards from it and here's an open mechanism to measure how true-to-form it actually is'