A recent thread proposed that a company should host any web application that they are going to put private data on so that the data will be secure from the owners of the web application.
If it came down to it, the poster said they would not use the application at all, if it didn't have a self-hosted version.
The options are:
Yes, we would self-host even if that means maintaining application code, severs, and physical security.
No, We would not self-host the application. The chances our data being stolen is slight because we are paying these guys to secure our data as well as provide the web application...
For the sake of the poll, lets assume any cost benefit for self-hosting would be wiped out by the costs of internal staff to maintain the web application and other costs.