A huge amount of indian tax payer money is wasted by corrupt top officials to cause financial losses, stealing all leads, orders, threatening local business owners, blocking payment, closing the account on various websites in an attempt to reduce the income to zero and force the small business owner to agree to identity theft, give up his or her resume to the relatives and friends of top officials.
In such cases, one of the only opportunities for making money for the small business owner is selling items at trade fairs, exhibitions. These are usually not very closely monitored, especially if they are held for a shorter duration of time, like a few days .
Earlier people could sell online without registration, however now GST registration is required for most portals like Amazon.