For the upcoming #1lib1ref period, I've refreshed the queue of suggested edits in https://tools.wmflabs.org/oabot/, to suggest edits from the most popular articles for which we found some OA link (~500 for now).
Hopefully this makes the tool more engaging for new users. Given the statistics on citation engagement recently published by Piccardi, Redi et al at https://arxiv.org/abs/2001.08614, some of the obscure articles we previously propose may not get a click on any citation for years. It's a bit lame to propose such edits, while spending a few minutes of work to add a link which can produce a few dozens interactions with OA repositories ought to be interesting.
The list of articles by their popularity is at http://doi.org/10.5281/zenodo.3783468. Maybe it can be useful also for other projects.
It's just a simple extraction from the pageviews API, but may save you some time if you're not used to command line scripts or your network latency is too high. Not to mention that querying 20k articles on TreeViews is prone to crashes.
Federico