split orbit
We can't made another land sale the same way it was in the initial sale for a couple of reasons. First, with the current land prices a new sale will give very little money to the studio so first it's needed to rise land prices enough to consider a new land sale. Second the amount of daily trades is quite low. If a lot of new lands are put for sale in one go the price will fall a lot. To minimize the price fall, the amount of daily land trades should rise considerably and future land sales cannot offer 20k lands in one go, but maybe offer at market price 1k or 2k over 1 month. How much to put for sale each day or each week will depend on how many trades are happening at that moment. After enough time if price and trade volume are enough there can be more small land sales. On the long term the studio can still sell 80k lands before reaching the total maximum limit of 100k. This maximum limit should never be broken. If over the years the studio manages to sell a total of 40k land plots at 1/5 of the price of the initial land sale 40k would still give the studio 28,8M$. Your choice, but if the studio closes the whole 80k plots will be worth 0$.
Regarding the company profit you should consider that the bigger the price of the items traded, the bigger the revenue from trading fees (at a same unchanged % fee). The higher the amount of items traded (volume) the more revenue from trading fees. This applies to land plots and also to everything else traded at the website. Aside from studio profit, rising prices is also good for attracting game investors in the short or medium term because people search to spend in something that rises price and gives profit. Also, items should have a minimum price to make them worth playing. If a player has to spend time to collect 5 illuvials worth something it's likely to continue playing but if those 5 illuvials are worth 0.003$ then probably for many players won't be worth their time collecting them and won't play.