We can't meaningfully advocate or plan for its implementation unless we have some idea how it would work. And that it can work.
The sorts of experiments in the OP get us no closer to that. They prove nothing that wasn't already pretty uncontroversial and obvious, and offer no insights about how these programs might be implemented universally.
Pointing this out does not hold back UBI. Ignoring it, however, does.
How will it work, then?