I'm looking for cases where data (including software) that once was open is not anymore, or was not for periods of several months or more. I can imagine several scenarios for this, including
- Technical problems (e.g. server failures, bandwidth issues)
- Legal problems (e.g. uncertainties over applicability of EU database rights)
- Social issues (e.g. new management at data producer, financial problems at data host)
I am interested in all of these and would appreciate pointers to concrete examples and attempted remedies. I have seen this related question that addresses the symptom of missing once-open data, but not the underlying causes.
As for link rot, I am right now only interested in cases where the data is actually not available any more, as opposed to not available on the original location, though distinguishing the two may of course be difficult.