If you want to join a campaign, the manager of that campaign will select whether you are eligible to work there. Try to understand with a simple example, suppose you went to work in a company in real life and even submitted your CV there to get selected. You have completed the preliminary work of joining the company now all that is left is in the hands of the company i.e. if that company accepts your CV then you will get a job opportunity in that company.

Similarly here you have submitted proof of authentication i.e. completed your initial work now it depends on this campaign manager to select you for this campaign.

Moreover, this campaign stopped accepting new members before the date you dropped your application here. For which was written Close for New Participant (CFNP)