Is there something wrong with this journal type?

Is it just me or is there something wrong with the type used in this journal? I'd like to send them a note, but don't know how to put it in words. The lines look irregular, both vertically and horizontally to me, but maybe it is just that the column is too narrow to do full justification at that size?

The full article is [[http://openresearchsoftware.metajnl.com/article/download/jors.ay/64|here as pdf]]