The vinyl tracks posted here aren't necessarily bad. "Bad Vinyl" is the social label these records have been given--forgotten in attic boxes, sold of in garage sales or second hand music shops for nothing.
Although a great many of them are really bad.
Of course, all tracks posted here are owned solely by artists and companies who control their rights and yada yada yada. They are posted here in streaming format only for your momentary listening pleasure (or displeasure).
Some of them may be available on iTunes, but many are not available anywhere.