New drugs get a period of time where the company that developed it has exclusive manufacturing rights. The idea is that if anyone can start making the drug immediately, there’s not a good reason for companies to spend money to develop new drugs. However if demand for a drug is greater than the ability of the creating company to produce the drug, other companies are allowed to temporarily step in and make up the difference.
Having a usable product while your opponents continually shoot themselves in the foot is a viable market strategy.