Actually, RFD-TV recently lost its noncommercial status, making it ineligible to be carried as a PI channel. My guess is that E* & D* have enough rural customers that consider this an essential that it will be able to move into basic packages easily.
Info:
http://www.multichannel.com/article/CA6397179.html?display=Breaking+News
As for HTVN 9417 - this is a network that never had a website, never had a consistent schedule of airing programs (i.e. on the hour or half hour), and (now) never amounted to anything. Not sure we're missing much (besides patented "Yogilates" videos) - but I look forward to seeing what other new PI channel may take its place.
Good Samaritan Network (9416) occasionally is used for training classes for the Good Samaritan employees. This is apparently all it will ever be used for. However, it is a permitted use - it does not violate any FCC rules. Seems to me that they could obtain some significant "underwriting" or "financial support" by offering up some airtime to other non-profits that don't control another PI channel - especially evening/overnight airtime, when it is unlikely they would ever need to air any training classes.
Also, I don't know if they are doing this for all of their non-slideshow programming, but at last check, some of the classes were being broadcast by DISH on a different virtual channel at 61.5 // 148; this virtual channel was only available to GSN's own pre-authorized receivers, and the normal GSN 9416 was "OFF AIR" during this time. Just like the shopping channels that share with virtual "BTV" channels.
This leaves DISH with two open PI slots, assuming RFD-TV doesn't appeal or doesn't win such an appeal.
My guess is that after leaving Sky Angel, 3ABN would be trying hard for a PI slot, since they did get SA* to approve such a move. I'd also guess they'd prefer the CONUS coverage of the slot opened up by RFD-TV's loss, rather than the limited wing satellite slot left by HTVN.
A real long shot: The FUNimation Channel. They already air a block of programming on ColoursTV, which would have to be dropped if they get a 24/7 channel. It is unclear whether they can afford such an undertaking, but worth noting that they do own U.S. rights for virtually all their anime. Therefore, since FUNimation profits directly from any DVD sales, it could be argued that the PI channel itself could be a promotional tool merely by airing the shows available on DVD, even though no "call to action" or "buy now" types of statements may be broadcast.