The big plan is a war of attrition to capture a monopoly/duopoly status for taxi services within a given country. Acquire all competing taxi companies or price them out of business.Once that is done, raise prices. If competition arises, lower prices again until they go away. In some senses, its just like Amazon.
How long can they afford to fight it? It's not hard to spool up a rideshare competitor per say. When they pulled out of Austin several other rideshare companies popped up in their wake. If prices got exorbitantly high for the average user, I wouldn't be surprised if a company came in undercutting uber.
Agreed - its "an" investment strategy, not necessarily the best one. And if you have Softbank's backing - maybe a valid one? Kinda works/worked for Walmart/Amazon.