Subscribe form in Upfront Spirit Theme

Hi,

Where can I find the results of the form submission? Will it only work if I buy gravity forms?

Also, what's the best way to only search the 'upfront' or 'spirit' forums? I couldn't find a filter.

Lastly, since I paid for the membership here with all your advertised plugins, why would you advertise a 'paid' alternative for subscribe forms? Can I not just use something I already paid for?

Thank you,