Marketo links are "shortened" to 115 characters (in my case) after the domain, in the form of:
dc/Ew-Ao7-671NAVNrymYLPLBa3Wj5i029KTyoB6rQglxv3rnLw97SEisdQdZeeIWP4PMe-Mqah6TD6_qGp9IJFww==/P000801GxD0pk80z0nKX7S2
Running that same link through bit.ly results in this:
1KCTpnX
(seven characters). I am positive bit.ly has orders of magnitude more links running through it than does Marketo. Very few characters are needed: using upper and lower case letters plus numbers means there are 62 combinations for each character... or nearly a billion variations for five characters (if I did my math right).
So why can't all Marketo tracking links be six characters long (apart from the domain)?
I would have to imagine that would look much more friendly to algorithms which are looking for long links to identify bulk/spam messages.
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