Number of GitHub projects archived on Zenodo

Remove GitHub unless it publishes a data dump with said repositories. (For instance on Software Heritage.)

Add: number of software deposits under an OSI-approved license. Source: BASE. https://www.base-search.net/Se...

And GitLab, SourceForge, BitBucket... those may not be excluded.

Question: how can you select/filter "scientific" project from other types of project?

This definitely needs to be extended to other repositories. The once mentioned by Egon Willighagen above as a start, but many more exist. The Journal of Open Research Software has an extensive list: https://openresearchsoftware.m... Again, a case were the proposed methodology would under report already existing efforts towards OA.