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"
They are under the GDPR.
If you ask for my data, you must do so fairly and tell me what you are using it for.
In the examples you site, if you read the small print "sharing with partners" will go on to say advertising 'letting you know about products and services' and other such shite.