help! [humble monthly]

no

you don't need a card , but you might need a verified paypal to do that
at least i didn't need a card

Theoretically it's a form of identification verification to prevent purchase abuse, and you just need a verified paypal account. The credit (or debit) card would just be a way of verifying the account.

It's not that you need a credit card to pay for your bundle, but many merchants require that Paypal accounts have a credit card as a backup payment method in order for them to be accepted for payment. Doesn't matter how much you have in your account, they want the credit card there as a form of verification and guarantee, probably because they've dealt with a certain amount of fraud in the past.

Now, here's a trick, if you have a debit card with a Visa, Master Card, or other credit card payment logo, you can use that to get around the restriction. You can also use a pre-paid credit card. They just need something to be there.

I personally have my bank account linked and never have problems with it. I've not tried subscribing to any montly bundle however.