As above, plus... if they were adding this new content with the intention of selling more copies now, why arent they advertising it on the homepage? They've announced Ford is coming, Formula Gulf & Raupuna, Mitsu, some more Lotus classics, and 4 British laser scanned tracks.
There was a handful of near finished *looking* tracks a few months back like Donington, Hock, Mugello, Brno, Catalunia etc but theres also been WIP ones like Suzuka & Laguna Seca which seemed to be near complete within weeks. Plus WIP ones that will probably take quite a while to get right, like Monaco, Nordschleife & Le Mans, because of the scale of the task to get it right.
I have to say though, if getting access to an very rough draft of a track, is enough to draw people in and contribute to the development, and they're not happy that its a rough draft and feel cheated... who's fault is that? Nobody is remotely suggesting its anything like finished, and if people dont understand the process and you paid your money anyway, maybe its a lesson to check what your spending money on before doing so.
To me, this is a lot like being in LFS from the beginning, seeing things unfold and come to life, except were getting to see a lot more than you typically see with any other game, you do see the good and the bad, but that also gives you faith in the product when the problems are quickly dealt with. Its the nature of the project, and IMO its worth €10 to see how it all happens, the whole process, and to have a small say in shaping its direction and implementing ideas that other games dont have.
For example - Im hoping to get them to implement racing number plates, where the game places a 'decal' onto your car in a set location, and puts your assigned race number onto it. On top of that, i've suggested adding driver name & flags, and even ident colours, which would essentially be a skin with fluorescent yellow/orange/green/blue etc pieces that would distinguish 1 identical car skin from another, like you see in F1 where one driver has a Yellow T-bar, the other has orange.
With all the above, you'd never need to create individual driver skins for a team, You'd make 1 design, and the skin would be customised by driver name, flag, and chosen number, plus the ident colour if desired (i'd have it as an RGB 256 colour slider or something).
Its nothing major, but its a good idea. Not only does it save time for skinners making duplicates, it also means everyone else only has to download 1 skin, not 6 because theres 6 variations of it in the server. Its also good for realism, customisation, and its a unique selling point (small USP, but they all add up).