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Are you talking about the mkt_tok query parameter?
This doesn't look like spam to any modern spam filter. It's just a long alphanumeric string in a query parameter, and the domain is clear to see (your branding domain). And the mkt_tok has to exist at a certain point (i.e. even if shortened, it has to then be put back on the URL after expansion if the link is going to be tracked).
It's more spammy to use a link shortener, actually, since those (by definition) obfuscate the final destination of a link.
That makes sense--thanks for the reply!