ok seriously now....
first of all i don't dupe
secondly to answer your question, every one on the baltop list got their money one way or another but it's all black market and black market only.
there are two approaches for that, u can take one, u can take the other or as I did, do both.
start up by building iron farms, I built 4 mega farms with a one afk room in the middle of them so I can afk at them all with one account only.
iron farms can make up to 11000 iron per hour if u made it 4 layers farm which is about 384 villagers per farm or 1536 villagers in total.... this can pump 44000 iron ingots per hour aka 233k per a single damn hour however it's a pain in the ass to sell of them so yeah.
second way is ender pearls and looting 7, u can make a mega ender man farm and btw end world is not limited to restrictions that are made to prevent lag so u can go ham in terms of cramming a hundred enderman in a 3x3 area and hoppers work really fast and efficient.
these are the best two ways however there are many other ways like melon and kelp super farms in the end world and gold farms but these are kinda painful and hard ways in terms of selling since epearls and iron are 5.3$ and very easy to collect and store unlike kelp which is 2$ and u may end up like
T
TTVHenryDanger
having hundreds of double chests of it and not knowing how the fuck u gonna sell of this in 24 hours or end up like me building a massive gold farm then realizing that collecting all the nuggets, turning it into ingots, turning them into blocks and storing them is actually too hard and eventually give up and make it a public farm