It's likely that yes, you will end up with an alias that links you because of a cookie somewhere, or a finger print of the elliptic curve when do do a SSL handshake, or any number of other ways.

The ironic thing is that because of GDPR and CCPA, ad tech companies got really good at "anonymizing" your data. So even if you were to somehow not have an alias linking your various anonymous profiles, you will still end up quickly bucketed into a persona (and multiple audiences) that resemble you quite well. And it's not multiple days of data we're talking about (although it could be), it's minutes and in the case of contextual multi-armed bandits, your persona is likely updates "within" a single page load and you are targeted in ~5ms within the request/response lifecycle of that page load.

The good news is that most data platforms don't keep data around for more than 90 days because then they are automatically compliant with "right to be forgotten" without having to service requests for removal of personal data.