LEP was offered again when Horizons was released or some time before the release. You could choose buy horizons or the LEP and have the Horizons update and all in the future for free. You got the Cobra MK4 also as every player that bought horizons at a limited time frame.Between Kickstarter and Horizons, the LEP was available during early alpha/beta days of ED; I bought mine in July 2014 for €40.
In fact I believe that was the first time the name “Lifetime Expansion Pass” was used, and unlike the “unlimited access” Kickstarter pledge, originally the LEP did not confer access to betas — that started with the 1.4 beta in mid-2015, IIRC.
The price was 170€ or more. The LEP was also offered sooner at the point Where Kickstarter was running maybe later too and did not cost that much.
As LEP owner i had access to all betas that came after Horizons release ( maybe i could also parcipate in horizons beta if there was some. I cant remember it anymore ).