The jumper platform allows a total of 10 events upload for a general user.

Appsumo users can upload a total of 50 events.

In order to add more than 10 events, there is a hack that could be used. The hack would be to invite and refer friends to jumper platform. Invite 5 friends to unlock 15 more events.

Please note that your account would be upgraded to a total of 25 events automatically only once your friends have added their first event. 

You can invite your friends from jumper dashboard itself. This can done as top menu bar -> account settings -> unlock features.