Can I give someone the ability to sign up for a subscription and pay an upfront $50 but a monthly fee of $25?

2. Can I give someone the ability to sign up for a subscription and pay an upfront $50 but a monthly fee of $25? My merchant is Paypal. 

This is the form: https://www.jotform.com/build/80656293784166

Yes, that is possible here in JotForm. You can set the First Payment to $50 then a monthly fee of $25. Here's a guide that you can follow: https://www.jotform.com/help/166-How-to-Setup-a-Recurring-Payment-Option

Related guides:

https://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form

https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal-Standard-