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The hard part is getting people to do exhausting, boring, smelly mundane tasks that don't garner applause.
Those tasks are more numerous by orders of magnitude, until we achieve post-scarcity.
For example, further polishing this emulator implementation to be compatible with a larger range of titles and host system configurations.
At some point, it always becomes a job.
It sounds like you're conflating a few things. UBI is as it says, an income that is given universally. UBI doesn't imply a certain amount of income. Other phrases may be used for what you seem to be describing: full basic income, guaranteed minimum income (which implies means testing).
Honestly, I'm not sure the frequency needs to be extraordinarily high. The ability to get rid of the "but think of all the jobs that will be lost" argument lets us get rid of swaths of bullshit jobs that don't need to exist, or even actually harmful jobs. It's been a constant roadblock to greater automation.