10 min blocks and readjust every 1000 blocks so readjust every 7 days or so but that will much less due to all the new hash.
Difficulty = 3925 TH
Block reward = 240'000 coins
Miner hash example = 1 GH
(insert math) 5283 Sia Coins per day or roughly $3.69 per day..$110 month (that will actually be more due to blocks getting solved fast on pool)
Only 686 blocks to go until readjustment so enjoy this profit until then.
(Apply ghetto math) seems it would be more profitable to just mine sia coin directly.