as a lifetime pass owner from first wave I've decided I hate having it, I genuinely felt that I was ripping them off slightly and when Horizons came out I bought a second copy just to continue support. Now this isn't me giving it "Look at me, LOOK AT ME!!!!!PENGUIN" but every LTP owner should understand that by simply having a LTP, we shorten the actual lifetime potential of the game.
Maybe its just me but at some point I always expected the LTP to expire and I wouldn't really care if or when it did because from a purely £££'s per hour that I had out of ED point of view, it was a shocking deal for FDev. There comes a point where you have to understand the paradox of a life time pass and that you cant have both a long life product AND everything free, one cancels out the other.
Now you can argue that FDEV should have foreseen this and put an expiry date on it but they are a little bit too cuddly for that sort of thing, they probably expected some common sense to prevail and the goodwill to be reciprocated.
To suggest that as an early backer you could receive a refund if they (and god i'm not even suggesting they are, don't go there) added paid for content outside the scope of LTP owners is laughable, at most the best you could hope for is some form or pro-rota refund based on usage and as you are still here 4 years later and paid a pittance for it in the first place you would probably be so far out of pocket chasing it it would be folly.
Seriously when these thoughts cloud your mind just go and make a brew and have some cake or something, its a hypothetical problem you have no influence over.