Far and away the weirdest nagware I've ever seen. A website distributing PDFs of academic papers requires me to wait 120 seconds until I can download, but the clock ticks only while I am on that site. I can't go and do anything else. Of course, I can also "donate".

@jeremycherfas seems a little suspect?

@cn I didn’t think to check what they were doing in my browser while I sat there.

@jeremycherfas how many complex calculations can your browser accomplish in two minutes?