It’s not that hard to understand. Numerous baalebattim, seeing the promotional materials for KosherSwitch, asked their rabbonim for guidance. They, in turn, did research, including contacting some of the supposed endorsers, and ultimately, the gedolei haposkim. One was probably ambitious enough to write up (or have written up) a kol koreh to be presented to the poskim to sign.
At the same time, one or more of these rabbonim, hearing that the gedolei haposkim asser, approach Ami and Mishpacha to have the articles appear. As a hot topic, they’re happy to oblige, and sell magazines. Alternatively, they become aware on their own of the issue, and issue their latest issue with articles on the issue.
Not so difficult to “organize”.