TikTok came back online after Donald Trump promised to delay a law banning it, but its service providers have taken different stances on the ban.

The U.S. Treasury Department on Friday imposed sanctions on alleged hacker Yin Kecheng and cybersecurity company Sichuan Juxinhe Network Technology Co., accusing both of being involved in a series of hacks against American telecom companies.

The president-elect unveiled plans for a Day One executive order to save TikTok from a ban, which is immediately raising a host of legal questions.