When a big customer makes a feature request, call it a change request and tell them you'll make them an offer (they pay money up front) for it. Sure, if they ne

When a big customer makes a feature request, call it a change request and tell them you'll make them an offer (they pay money up front) for it. Sure, if they never adopt the product the effort could be better spent elsewhere, but at least you'll get paid for their bullshit. If it's expensive for you to do then you should always demand real money up front.