It didn´t come with being a founder. I paid 120 € on top of the 60 € for beta-access. Yes, I got the black paint jobs, but I would have also gotten them from just preordering the horizons-dlc the day I bought the LFP instead.
And yes, they said they would release paid content covered by the ltp, but on the other hand, it comes from the people that said they were doing something against combat logging, which they obviously don´t.
At the moment it is just the paint jobs and the Cobra IV access (plus the early Beta access) as far as I can tell, but I doubt very much it will stay as only that. There is still a lot to come from ED so I'm not concerned about either of my LTPs not producing too much automatic access over paid content at this stage of proceedings. I'm sure there will be lots of future content that will ordinarily have to be paid for as an add-on, which we will have free access to.