Two features, that I love, that Instapaper has over Read It Later Pro are pagination and Readability support.
Scrolling works OK on PCs because of spacebar/PgDn it is pretty stupid on touch devices. However, pagination, at least as implemented in Instapaper, is not without it's downsides. I sometimes have issues with pagination not being consistent (moving back and forth are sometimes not exact opposites).
Since I am viewing content without ads and want people to be able to continue to write I support Readability. I don't know that they deserve the 30% cut they take but there isn't really much competition out there. Flattr doesn't count in my book though it is similar.
Scrolling works OK on PCs because of spacebar/PgDn it is pretty stupid on touch devices. However, pagination, at least as implemented in Instapaper, is not without it's downsides. I sometimes have issues with pagination not being consistent (moving back and forth are sometimes not exact opposites).
Since I am viewing content without ads and want people to be able to continue to write I support Readability. I don't know that they deserve the 30% cut they take but there isn't really much competition out there. Flattr doesn't count in my book though it is similar.