s2member paypal button change quantity

I’m using s2member to allow people to register for an event and pay $10. Its a one-time payment which allows them access to vote. I want to give people the option to change the quantity in the PayPal payment page. In PayPal’s buttons, there is an option to allow the user to change the quantity, but I don’t see anything about it in s2member.

Also, will this send multiple registration emails? For example, if one person registers 2 people for the event (changes the quantity to 2) would they receive 2 emails to create 2 accounts?

Thanks for any help on this.