Some are diagnostic companies, some sell services or precursor products. There are not 6,653 biotech companies seeking approval for one or more drugs.
This is exactly correct. A network of connecting (sales-support-spend-regulatory-..other)revenue/change triggers is well know/established . For example, Every new MRI installation/change/and all such capital/investment triggers are always hard wired for changes(+/-). This stands for big OEM suppliers/facilities installs w/ a long list tightly networked interests. Services are huge rev. interests.