Songtrust does offer pipeline advances, on a case-by-case basis. If you’d like to request a royalty advance consultation, submit a request here. Note this is not a publishing advance, but instead an advance on royalties in your account. Click here to register for Songtrust, and use promo code STSoundfly for 10% off!
This isn’t to say that we only like songs because our brains are lazy. It has to do with how our brains process new information as it fits into a given context, in this case, how melodic notes fit into a key.