That's because they have no revenue and significant operating costs. Turns out there's not much money to be made in providing a platform to Nazis and conmen. There are all the MAGA idiots on there, but what little wealth they have has already been tapped out by the dick pill salesmen, their pastors, and Trump himself (plus whatever the latest pyramid scheme they've signed up for this week is peddling).
Sadly I don't think this is really true. That's why at least some idiots think the platform is worth $11bn. Users don't need to be wealthy, just stupid enough to click an ad for said dick pills.
Theres lots and lots of money to be made. The poorest ones will happily go into debt to support the various grifters. Truthsocial is basically nothing but grifting posts of the Trump base.