Hi Ivan:
This is our supported customer, so hope to help clarify. It's a more general question around Audience Lists, specifically Customer Match Lists (CrmBasedUserList)
Thinking on their behalf, question in pseudo-code:
1. Campaign (With Id: "A") exists within Adwords Account.
2. Customer creates CrmBasedUserList "B", uses MutateMembersOperand to add 1000 email addresses
3. UserList "B" is added as CampaignCriterion to Campaign Id "A" (in step 1)
4. UserList "B" is then mutated using MutateMembersOperand to add additional members (email addresses)
Question
B. How long will it take for Campaign "A" to start targeting the additional members added in step 4? Does this happen as soon as the "several hours" (Above) have passed? Or is there a delay between population and actual targeting?
Hopefully this helps clarify, please feel free to contact me directly for more information.
Thanks,
-joe