Is there going to be signature campaign?
Before requesting for a signature campaign did you even bother to know what service they are offering??
I saw that you’ve became more curious about joining a signature campaign yet you don’t engage in discussions here - if they should host a signature campaign [which they won’t hold] you might still not be selected because of your post.
For now forget about about signature, just try to engage in discussions and let your presence be felt, that way managers will be more than happy to have you help promote the campaign.