Adding a new profile field type

Currently there is no support for custom profile field types

But I see two custom fields in 11? Are they deprecated? 

Telligent.Evolution.Controls.EmailControl, Telligent.Evolution.Platform

Telligent.Evolution.Controls.CheckboxListControl, Telligent.Evolution.Platform

But I see two custom fields in 11? Are they deprecated? 

Telligent.Evolution.Controls.EmailControl, Telligent.Evolution.Platform

Telligent.Evolution.Controls.CheckboxListControl, Telligent.Evolution.Platform

Maybe I am not understanding your question, what are you trying to do?  User profile fields are limited to the drop down options in the UI, custom is not one of them

I am trying to create a custom profile field that is not editable, so basically a label. I will fill the data from a 3rd party source via the profile APIs. I assumed the drop down in the UI is reading from the cs_Profile_FieldTypes SQL table. 

As I have mentioned there is no support for custom fields, modifying the database or a third party library can jeopardize your install and support.  If you want something special like this you will need to write your own data storage and code to support it.