The importance and effectiveness of online shopping has heightened as economies around the world were forced into a lockdown during the COVID-19 pandemic. Online market platforms like E-Bay and Amazon experienced a dramatic increase in sales revenue. You can read more about these online market platforms on Wikipedia, for instance, (https://en.wikipedia.org/wiki/EBay and https://en.wikipedia.org/wiki/Amazon) and also browse the respective websites (https://www.ebay.com/ and https://www.amazon.com.au/).

The costs to the buyers on shopping by using online platforms is zero while the costs to the sellers in participating in these online markets are almost zero (and negligible relative to the large sales volume). The costs of exiting these market platforms for sellers is zero. Assume that the costs of shipping and transactions costs are zero and let us consider the product hand sanitizers in an online global market.

Question

Let us assume that hand sanitizer sellers in these online market platforms are making a profit in the short-run. Show this situation using a diagram. Consider the entire global market in this case. Now, explain with the help of another diagram the adjustments that may occur in this market in the long-run.