The major benefit of crowd sourcing in the projects we used was that it utilizes external, usually uncompensated, labor in order to expand the information presented on the site. The use of human labor provides a service that cannot normally be done through computational methods. This creates a community which is contributing to something that they find worth while. Best scenario for a crowd sourcing project would be something similar to Wikipedia, where the community driving the informational database flourishes and creates generally reliable pages of information. At the same time the creators of the project are benefiting through a free source of labor and a means of easier sustainability. Therefore, from a business standpoint it is an idea with a lot of potential, but this comes with a few assumptions.
These assumptions can be viewed as the drawbacks of creating a crowd sourcing site. The main assumption being made in the creation of one of these projects is that people will stay interested in contributing to the community driven informational input. With websites such as MapGive and apps such as MapSwipe do not provide a tangible output to your input, making it seem not worth while for many users. Another issue that may be seen in these sources is the human error that must be accounted for in these mapping sites. It is accounted for through motoring the results of the submissions on MapGive, so this is not a completely community driven project. In the end a crowd sourcing website has a lot of upside, but it must be managed correctly in order to maintain a productive community.
-Seamus Glavin, Jacob Circelli