150$ a month from a tool to convert data from columns to comma-delimited lists

hi, how do you like the idea? Adam built delim.co - a free comma separating tool and now he reliably generates $150/mo. The tool is used by the same developers, SEO experts, and many other to convert data from columns to comma-delimited lists. Or the other way around. https://www.hostinger.com/blog/money-online/how-to-earn-online-by-building-software-as-a-business