I think the link and prices you have are outdated but it’s directionally right. They are probably buying s19xps / trying to get s21s too. These machines are 21 and 16.5 j/th respectively

Let’s assume it’s all XPs at 140TH. These machines probably cost 3-4K each assuming bulk discounts etc. At 3.5k that’s $25 per TH. Still 200M in just asic prices alone. If they are self mining theres another $50-100+ million to build the infrastructure. Based on the speed of deployment they are likely hosting with a larger public / private miner. Keeps their capex focused on miners but results in higher electricity prices and variable costs.