Plugin description says required Yumpu account is free, but on entering API key from this free account get the error message "To use this feature, you must be a paid user" This seems misleading to me.

Since months it doesn't work. No answers, no support. All work and all words gone with the wind...

I uploaded a Pdf on yumpu.com, apparently successfully. It was only during the upload process that I learned of the adverts to be put on the ePaper in the free version. I got the API and it was accepted by the WordPress plugin. However, the plugin did not list my Pdf from yumpu.com. I uploaded the same Pdf directly into the plugin, but it still did not list anything. I went to delete my yumpu.com account, but could not find a route to do so because it demanded a password, and I had signed up via Google and I so had never set a password. The yumpu.com profile change-password option demands the old password first, even though I am logged in. The login password reset email's link simply goes to the yumpu.com home page, so I cannot set a password. Ah, that is while I am logged in! It does invite a new password if I open the email's link in a private browser window... that's a fail. Even now, with a password set, the delete-profile option fails: "Ooh no, something went wrong !". How can I delete my yumpu profile?

Not only does this plugin require registration on their website in order to get it to work, even just clicking on the link to add the API key completely rendered my admin access unusable until I restarted my browser.

For me, this plugin is a nice way to increase my visitor’s time spent on my blog

Das Plugin funktioniert gut. Finde die Darstellung des Blätter-PDFs auf der Webseite sehr schön. (Sarina Leermann)