No idea what "green dot" is, but if you're scared to give paypal your info...you need a reality check.
Paypal is a WELL established site, and is secure as fuck (though their supprt department is full of braindead monkeys).
They won't do anything with any info, obviously. Why would they jepordize their business to knab your $10. They'd be gone if they were going to do business like that.
Just make a paypal account and set it up properly. Paypal is basically required if you ever want to securely buy anything on the internet. Practically every site supports it (Amazon excluded, they're stuck in 1999).