Investors can choose to purchase more shares through a dividend reinvestment account, also known as a DRIP. This allows for the automatic reinvestment of dividends into additional shares of a company's stock. By opting for this method, investors can increase their ownership in a company without having to use additional funds. This can be a beneficial strategy for long-term investors looking to maximize their returns and potentially increase their dividend income over time. However, it is important to carefully consider the company's financial health and future prospects before making any additional investments.