I am totally agree with collaboration and assisting other dApps on testing and improving. The real reason behind "testing" can be a stimulus package for the dApp itself by boosting usage and traffic, that way not only will enable a dapp be able to have higher exposure, at the same time feedback from community user will be able to assist the principals to improve user experience.

On the side note, #wherein is an example of beta projects we've been running and improving over the years.