Fabric is a very different animal than PCV banner. Often times it costs more, has higher waste due to webbing, and has very different finishing requirements such as sewing. All of this adds up to fabric being more costly to produce, particularly in small quantities. Asking someone to fabricate a custom flag or two for $1.50 or $2 per square foot is not realistic, given the amount of work involved with fabric.
On the other hand, it has a unique look and feel that PVC banner cannot compete with, is much lighter, drapes and flows more naturally, and has higher perceived and market values. For those looking to get into the world of digitally printed fabric you need to have real examples in your showroom that customers can see and feel.