Why do I keep receiving "Bitcoin" e-mails?

So I invested some money into crypto and I started receiving e-mails from scam "Bitcoin investors", "metamask support", "trust wallet support" etc. How do they know that I use those? I don't think everyone gets these kind of email's so where does the sender of the email know from that I use these different services? Does anyone here care to explain how something like this works like?

submitted by /u/Humongous_Ego
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from hacking: security in practice https://ift.tt/3GsZfbT

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