If a publisher violates a tax law, it can be shut down without worrying about free speech issues. Same with a phone company or church in violation of federal laws (although large lawsuits are a given). Tiktok is not being shut down for its own speech, but for being an agent of foreign espionage and foreign contributions to political candidates (essentially). Thus the first ammendment issue is moot.
Signal isn't sponsored by foreign governments, so it is immune to this sort of attack. It looks like Briar has German funding. The encrypted and decentralized nature of both of those apps makes them much lower concerns for espionage and (election) interference, and of course neither provides content directly from foreign governments, so they cannot be called into question for campaign interference.
Signal isn't sponsored by foreign governments, so it is immune to this sort of attack. It looks like Briar has German funding. The encrypted and decentralized nature of both of those apps makes them much lower concerns for espionage and (election) interference, and of course neither provides content directly from foreign governments, so they cannot be called into question for campaign interference.