Honestly, I think it's on personal preference, to me, it's a disappointing power in my opinion, as many people have said, charging people for a feature that was once free, is weird.
I'd much prefer this "power" just to be a feature? It'd fit more as a feature than a power,
There's much more that could be added as Ethan said, if you're going to charge someone for a function that was free, then make it better, rather than not as good as the free version.
xat lacks free functions / ideas, whereas the powers are very disappointing these days, I used to get so hyped up waiting for the new power to be released, these days it's "oh, another smiley power" "oh another function, that's not going to be used"
Again, I'm not saying this to put anybody's hard work down / all the stuff they've created, good on them, this is simply, my opinion, someone who has used this site for the past 12 years+