I’m not sure if you have this option, but if I choose one of my University’s themes, the “powered by qualtrics” message dissapears.
There is also this piece of code which does the job from https://gist.github.com/KamikazeBot/938216d4af1747592972
var plug = document.getElementById(“Plug”);//Get the Defined element
plug.style.cssText += ‘;color:white !important;’; //Set the defined element’s display style to “none”
I have had success inserting that code into the QRTE code, right after these two lines, appearing around line 420 or so depending on which version of QRTE you are using.
//Initialize the library itself (necessary for each trial)
QRTE.initLib(paramObj.blockData, paramObj.blockId, paramObj.columnData, paramObj.idData, paramObj.exitQuestions, paramObj.exitItemTag);