Accounts or Devices (e.g. Phones) That Get 'Burnt' Have Many Pitfalls
One upside of all the 'burner' things is that they may seem easy to adopt/learn, though usually not cheap (disposable devices or long setup processes for accounts which are 'throwaways', sometimes "single-use"). We caution people that sending us sensitive stuff with no encryption may leave companies like GAFAM and maybe several ISPs in several countries (ISPs work with/for the state) with full knowledge of what's happening (or full access for information, insight upon demand). Embassies and consulates habitually fail at this (they're based on foreign and potentially very hostile territory); they don't seem to understand what's at stake or how to implement confidentiality as they resort to advice from GAFAM goons (salespeople), not experts. One of them told me that he wrongly believed by turning "Location" off Google would no longer be able to track his movements! I corrected him. He seemed terrified by the revelation (he's a diplomat in the EU; UK isn't in the EU anymore).
Another thing is, with the 'burner' things, one cannot really talk back (or not for long), so clarifications/followup questions are sometimes infeasible. It's a one-way communication channel in some cases.
Are these limitations a worthwhile tradeoff?
Not really, or not necessarily.
With the 'burner' things, there's limited assurance of anonymity (the content can be correlated with a person either by the medium or the recipient; the medium is likely apathetic or hostile towards the protection of sources). Moreover, 'burner' things have a place in modern society with modern [sic] technology, but they're typically to be used when anonymity is of utmost importance, bearing in mind a message's content can help reveal identity of writer/s (depending on the context and who gets to see the message sent from a metaphorical black hole).
Most of the 'burner' things are from older times when technology was very different and surveillance (by companies and states; GAFAM works for the US state) wasn't as intensive. Many drug dealers (or users) still rely on the 'burner' things, maybe because a cheap phone is vastly cheaper than a tube with cocaine. Is that you, EPO? █
The "Alicante Mafia" [1, 2, 3] truly sucks at SecOps; this works to our advantage.