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FR24 allows aircraft owners to pay to block historical data and tracking.

ASDB Exchange [1] does not filter historical nor real time ADS-B data. Commercial use does require a license, enthusiast use does not.

Jack Sweeney [2] was/is using the above to tweet Musk's jet movements [3], and has pivoted to tracking Putin's and Russian oligarchs' aircraft [4] [5].

[1] https://www.adsbexchange.com/data/

[2] https://twitter.com/JxckSweeney

[3] https://twitter.com/ElonJet

[4] https://www.miamiherald.com/entertainment/celebrities/articl...

[5] https://twitter.com/i/lists/1307414615316467715

I used to use ADSB Exchange in a similar fashion, but there's no longer a free feed unless you contribute data. For my personal app it wasn't worth it.

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