Welcome Ramina. To give you and raj23 my thoughts on your concerns: It would not serve the success of the planform if people just up voted each other. Sure there are members who are not looking out for the community and would attempt to do this. They are kept in check by bots and other security measures, but the biggest policers of such negative activity is the vast majority on the community who have invested time, money and hope in such a revolutionary and potentially life changing platform. People generally are honest, and smart enough to tolerate activity that would inevitably lead to failure or the rise of a competitive platform this is more honest and equitable. This is a great platform and the vast majority of us want to contribute to its success which will benefit us as a whole.