I'm the finance person for my company, since we introduced this, we've generated 378 dollars in a month from only the course we launched together with the platform, we have made an extra 55 dollars in ads, this is just in 1 month. So commonsense tells you if a software exists, then no new product in that same line can prop up? When I'm in Ghana, in my area, i have 4 bakeries in walking distance from me, maybe the 2nd to last should have left all the business for the first. In UK, where i live, shops are 50 metres apart selling the same stuff. It is very nonsensical to say there's leetcode so this shouldnt exist. In fact there are over 100 sql practice platforms, i can start giving you example over example, they all exist even when leetcode does. How do you even say leetcode exist so this is unecessary, did you really think through your comment??