For instance, the suffix “-ed,” signifying the past tense in modern English, originated in “did” (that is, “did use” became “used”);
What? That is complete and utter nonsense. The -ed suffix comes from the suffix used to form the past tense of weak verbs in Old English, which in turn was derived from the Proto-Germanic preterite (which was an innovation compared to Proto-Indo-European).
The word "did" is just the word "do" with that suffix attached, not the origin of it.
I stopped reading the article as soon as I saw that, it's such blatant misinformation that could have been fact checked with a google search instead of a bizarre folk etymology.