Salesforce has announced an all-stock deal to acquire analytics powerhouse Tableau Software. Salesforce will pay 1.103 of its shares for one Tableau share. The deal is expected to finalize by the end of October, about a month before Dreamforce. A number of questions arise from this deal. For instance, why do it at all? Why keep the companies separate, and what will their relationship be like? What’s Salesforce’s end game? Salesforce always has had an appetite for expanding its footprint and previously often did its initial building in-house.