The fluid of the video you posted is 3M novec. While similar in performance to our system, it is extremely expensive when compared to our oil based coolant. Novec costs about $200 per gallon, while our coolant is less than $10 per gallon. While two-phase cooling is more efficient (1-2 % cooling overhead vs 3%) the upfront costs make it less attractive. Novec also evaporates into the air (housed in a sealed atmosphere system), and will need to be topped off occasionally due to losses from open lid servicing. Oil based coolants do not evaporate or oxidize, and last the life of the system. Both systems make air cooling look archaic from an efficiency, density and performance point of view.
You say 2-phase is more expensive yet you are charging nearly twice as much as Datatank. (As of ~6 months ago they were asking ~$0.45/W and they claim to have cut the costs significantly since then.)
Also about the fluid loss, Allied Control claims they lose less than 0.1% per month.