I (somewhat) agree that if there is only a single person's feedback, then RapGenius (perhaps) isn't the ideal model for everyone (though I personally like it a lot) - but, when you want to group source everyones feedback/annotations, it's awesome.
I read a lot of stuff on Rap Genius, and I find their annotation system to be one of the best - I was in a packed MRT in singapore, and was able to easily, with very little mental friction, read through the agenda and annotations, single handedly - thumb clicking the annotations and back.
I read a lot of stuff on Rap Genius, and I find their annotation system to be one of the best - I was in a packed MRT in singapore, and was able to easily, with very little mental friction, read through the agenda and annotations, single handedly - thumb clicking the annotations and back.