I have had people contact me through Wakoopa asking me what certain applications I use are or where to get them.
I have also done a lot to contribute to their repository of software information, adding application descriptions, tags, icon images, screenshots, making corrections, and writing short reviews for a lot of the software that I use.
With their latest version of the tracking software, it now includes web 2.0 application tracking (if you are using a supported browser), which currently is a bit of a mess and I have been pitching in and helping them sort that out too.
I get a certain amount of enjoyment out of contributing, in much the same way people enjoy making contributions to Wikipedia.
I always give things the benefit of the doubt, but frankly wakoopa is only useful to the people who run it, giving them great stats that they can use to do press releases and reports on the popularity of platforms, sites and apps.
That is not entirely true. As the community grows and people contribute to writing more reviews, it can be a good research tool even to those that don't run it. It can also be good for finding a download link for freeware that has "disappeared".