• Yes. There are hosts of third-party services available. But as usual, the cuts for commission is a bit off, but they work.
• Never bought Steem. Earned.
• Amazon? Nope, never bought a thing on Amazon. Really do not trust services asking for my debit card details. Or maybe I'm just not patient enough to understand the process.
• Yes I have a debit card.
• I do not own a credit card.
• Meaningful is rather subjective. I'd say "very meaningful" if we were back in December 2017. Now, I still earned a pretty decent amount of Steem with a lot less value. But it's just enough to get by. I'm good.
• It's a lot better than revealing my debit card details. So yes, I would buy stuff on Steem!