Being server first 50 miner on Cactuar server I made quite a lot of money since I was the only one being able to supply the whole server with rare mats and even the HQ. Selling darksteel ore at 12k, gold sand at 9k, gold ore at 3k, grade 3 matter at 4k, etc.

I used to make about 1 million each day, maybe a bit less but now I barely make 150k a day. The market is pretty dead for now, maybe housing will change that who knows