The story of WYVN Martinsburg WV is a sad one. They started out as a Fox station, but had all sorts of financial and technical difficulties from the get-go. Here's the story:
https://www.radiodiscussions.com/th...60-martinsburg-wv-winchester-va-12-93.567518/
And this from Wikipedia:
WWPX-TV - Wikipedia
A Hagerstown-Martinsburg-Winchester market would have made sense --- it's just a little too far from Washington and Baltimore for good OTA reception without taking heroic measures such as high-gain antennas and high towers --- but I have to think that the DC and Harrisonburg markets would have had issues with fairly large pieces of their market being nibbled off, and aside from local news (and not even then, when the local news is nonexistent or of low quality), viewers often tend to prefer stations from larger and more cosmopolitan markets (which wouldn't have been an issue where Harrisonburg is concerned, but what the hay?).
In its incarnation as Ion affiliate WWPX, the station probably finds its highest and best use of a valuable high-VHF (OTA 13) frequency, but it's interesting to consider what a robust Shenandoah Valley TV market, with what in the digital era could entail all of the major networks on subchannels, could have looked like. For a time in (IIRC) the 1980s, Hagerstown was actually a single-county, single-station (WHAG) free-standing market, but that wasn't bound to last long, as aside from local news (they did their best and met a local need), there was no way WHAG could compete with WRC and WMAR (and later WBAL). And when Washington County MD was reabsorbed back into the DC market, NBC wasn't about to put up with a secondary affiliate on the western fringes of its market. Look at what happened to WMGM and KENV in the Philadelphia and Salt Lake City markets respectively --- the latter was a serious loss for Elko County viewers, as that was their only way of having local news, SLC stations aren't going to cover anything in Elko. A remote station in a rural area. such as KENV, having TBD as their network affiliation, without local news that they can't possibly sustain financially, is about as useless as vestigial mammary glands on a boar hog. Total waste of spectrum.
Local stations in remote areas are at their best advantage when they can work out something with a larger co-owned station in their market, to take advantage of their resources and branding, to produce a quality local news product. No station exemplifies this better than WYMT Hazard KY, which is a semi-satellite of WKYT Lexington, and produces a high-caliber local news broadcast using both their own resources and those of WKYT (as well as simulcasting WKYT news in certain dayparts), the end result being that rural Eastern Kentucky has some of the best small-town local news coverage in the United States. The area is historically in economically (as well as geographically) challenging conditions, and benefits greatly from this.