You'll need to import custom objects of different types in separate files. The custom object import feature isn't designed to handle multiple types at once, not to mention that it ...
An empty value will be treated as a value when using custom dedupe logic, so in your first scenario, there will be two records created if you have custom dedupe enabled on the User...
There is no native connector available, so I would recommend using a middleware provider. I'm not certain about Cloud for Sales, but both Informatica and Dell Boomi have several SA...
I'm not aware of a limit for regular programs. There is a limit of 100/subscription for engagement programs though, which you can solve by deactivating old ones. If it's regular pr...
The ID is assigned at the time a lead is promoted to known. Prior to then, there is no actual person record, and thus no ID. The information gathered around anon leads is correlate...
Looks like it works fine, as I just tested it live in the console and it returns a valid cookie value. What exactly are you trying to accomplish with the custom builder?
I believe Wistia's integration uses the Munchkin API, so it's likely that the activities were archived as they are web activities. Were these greater than 90 days ago?