There are some great services that aggregate content from other sites for more “practical” viewing. A touchy issue with any aggregator is whether the original author gets “credit” for his/her effort. The original author may assume the content will be accompanied by ads to generate revenue. The author may attempt to offer links to other resources. Aggregators offer a user experience that deviates from what the author intended. While this is life on the web, there are clearly issues that have to be resolved so some incentives for content creation remain.
Flipboard is an example of an aggregator that has come under some scrutiny. The intent here is not to single this app out, but it does represent an example of the situation I describe. For a longer analysis that prompted this post see Is Flipboard Legal?
I do have to admit that the experience of using this product is impressive.