No one shuts in a well unless its operating costs (mainly salt water disposal or electricity if it is a pumping well) are causing them to lose money. We have wells that make about 5 MCFGD, which is the equivalent to about $10 a day. The reason is that if you shut the well in, you will lose the lease and be forced to plug the well. That will run you about $50,000. As far as the large gas play along the Gulf Coast, I am all ears.
If you really are all ears you might want to listen for Anahuac. I wrote a paper on it back in my PE years in college (76ish). Modern technology now makes this zone obtainable but demand must be there