It is stored in your My Sailthru Settings under Setup > Domains. Another operational limitation of URL shortening services is that browsers do not resend POST bodies when a redirect is encountered. Twitter will use this to make your timeline better.
Hootsuite users will see their links shortened, but non-Hootsuite users can also use the shortener. In some cases, the server may canonicalize the URL. Having a link shortener protects users from malicious sites that engage in spreading malware, phishing attacks, and other harmful activity. This UA code can be found next to your website’s profile in Google Analytics Dashboard.
Placeholders will vary from partner to partner, but are usually phrases delineated with brackets, such as {publisher_id} or [creative_name].
Some websites prevent short, redirected URLs from being posted. Example for event tracking using the newer API: Previous Next
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