score:2
Yes, they were. I'm not sure about generic, nondescript people, but they were sold to friends of the dead. Tetzel apparently marketed to all people indiscriminately, encouraging them to purchase indulgences for anyone they knew who had passed. *The Jesuit Priest in the Family, the Church, and the Parish: In reply to a Letter by W.H. Anderson says this on page 86:
Tetzel also asserted that Indulgences not only saved the living, but also the dead. He used, likewise, to harangue his auditory in such strains as, "Priest! noble! merchant! wife! young girls! young men! hear your departed parents, and other friends, crying to you from the bottom of the abyss! 'We are enduring horrible torments! A little alms would deliver us; you can give it, yet you will not!'"
Emphasis is the authorβs, bold text is mine. Credit is due to Tis_Bearself from Catholic Answers for this answer.