I thought the same thing. It snowed a bit here and all my signal strengths were all good except 99(cb). I cleared the snow and no change. Damn, LNB must be bad.
Came here and saw your post… Phew, not just me.
I use DECA to bridge some components from my entertainment center. For Netflix, gaming, or other video streaming, it works flawlessly. Those applications don't require anything above ~15-20 Mb/s. It's a very stable connection, too.
The ethernet port on the DECA adapter is limited to 100 Mb/s, so it sounds like that will be the limiting factor for you. The bandwidth for coax portion of the network is limited to about 250 Mb/s total throughput.
Still, much better than powerline in most cases.
Kept ours in the cupboard for 34 years (not the same one) and it's never spoiled. There's enough vinegar in it that it will dehydrate before it will spoil.