That signature goal is so low she's probably better off not even trying for the convention. Whether she's smart enough to realize that remains to be seen.
She’ll still need 10% at the convention no matter what according to the article
It's a "or". You need 10% at the convention, but you are not forced to participate in it if you have the signatures.
Oh, I had read it as
30% at the convention OR 10% at the convention + signatures
not
30% at the convention OR 10% at the convention + signatures OR signatures alone