Or just ban this kind of data collection. Is there any reason anyone would willingly click "Accept" when a website asks to share your data with 500+ partner sites?
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If the data is being sold, it should be legally required to word it in that way. If there's even the slightest possibility of your data being leaked to spammers, it should be worded to reflect that.
"Do you consent to us selling your data to any party that wishes to buy your data? Do you consent to the possibility that your data will be used to spam you or steal your identity in the future? Yes/No"
It may even be the case that the website pays X company to perform the tracking for their own analytics purposes. Or that it's X company's own freemium model where if you add their tracker they grant you a bunch of cross-site information for free.