Yes. Obviously. So the "cost of UBI" is clearly not $10k times (number of humans in the USA), but more like $10k times (number of eligible people making under $10k). The article omitting this pretty important thing basically discredits it and probably its parent site
They're not explicitly eligible, but rather implicitly eligible, because of the tax increase on the top end to cancel out the $10k they don't need and to pay for any gap that still needs closing after we redirect money from existing systems.
The people who as a result of this policy and the taxes net money is small, and that is the real cost. Not $3T which is a bald faced lie.