I doubt she's losing sleep over a few undersold venues here and there. Really, I thought the number of concert stops she's putting on this year is oversaturated, but the "international" part has really been capturing attention on social media, especially from countries she had never visited before, or rarely.
Supposedly the first Tokyo show sold out so quickly that more shows were added for that venue (seen in a tweet), which has a capacity of 14.5k. Maybe there were shenanigans going on, but who knows. I believe it was the Ireland stop that sold out first, and that has a pretty intimate capacity of 2k. I don't know what the ticket prices have been for these international venues, though.
Not bad for a Broadway chick, though undoubtedly Frozen mania still has influence (e.g. back injury from lifting an Elsa-costumed girl in Manila).
#BoycottTrumplikePattiMurin