It would make it clear or not whether the site tries at all to restrict certain recommendations like harmful content at least and the model would be different and less subject to top-down rules / policies like recommending government propaganda sites over independent sources. It could be used in later, better worded and targeted subpoenas for how said filtering and censoring works. It would also show if there exists a special promotion system for a company’s own products and so forth. In many respects, it acts like an org chart and to determine _what_ to scrutinize with more concrete actions as regulators and the public. It provides a map and that’s better than a black box or Skinner Box where we are the subjects.