Do you have any idea how much more it costs to release a record on vinyl rather than tape? Tape is the cheapest way to release any record, hands down, it's a cool item to have if you enjoy the band seeing as how they're extremely cheap, they come with digital download cards that usually cost about 1 dollar less than actually receiving the tape, and a lot of people still have cassette players in their cars.
And most people have a CD player in the car too! So, if you're going to listen to it in your car, wouldn't you want a much better quality recording? Most new cars have MP3 hook ups, that would sound even better. Just seems like a weird investment, and a weird think to try and promote.
People pay the extra for the vinyl!