Serious question (not in the US), if "all" the content on Parler was inciting terrorism or what have you, why was it not simply subpoena'd by the relevant autho

Serious question (not in the US), if "all" the content on Parler was inciting terrorism or what have you, why was it not simply subpoena'd by the relevant authority for user data? Isn't a site like this basically a honeypot for undesireables, and therefore a handy place for LE to round up all the people likely to commit violence? Or are there too many for LE, or is LE itself compromised and has members on the site?