They do. The problem is that the rules of DST change over time (sometimes at the very last minute https://github.com/eggert/tz/commit/868f3528a9fd60491439ce45...) and can lead to all sorts of date math bugs when comparing timestamps across timezones.

"The company doesn’t reveal how it works, but they appear to be flooding clients with fake information, masquerading as legitimate peers."

"For a month Pirate Pay’s technology protected the film “Vysotsky. Thanks to God, I’m alive,” (distributed by The Walt Disney Studios Sony Pictures Releasing company) with moderate success."

Sounds likely to me