Well, I am going to try to answer the question you asked and stay far far away from the rest of this thread. Anyone who has the guts to try this, and pursue it to the point of making it a business has my complete respect. I've been in the sales and marketing business for more than 30 years. I've sold $5 items and my largest sale was $20,000,000 (yes, there's suppose to be 7 zeros and 2 commas in that number, and "no", it had nothing to do with ceramics. :-o ), so my advice will, hopefully, have a little depth and weight. Here it goes...
The answer of Etsy v. Ebay is simply "Yes". You're asking about sales and marketing channels. A strong marketing plan will define 10 to 15 different marketing channels. Of these, at least 8 to 10 channels should be in active use at any time. The other channels should be held in reserve and placed into service should any of the active channels prove unproductive. What is unproductive? Any channel that doesn't produce sufficient revenue contribution, over time, to help you achieve your goal should be considered unproductive. You may reactivate an unproductive channel later for any number of reasons.
So Ebay and Etsy are two, your Facebook page is a third (social media marketing), build an email list and market by email (email / direct marketing - 4), pick up a table at Costco or a yard sale, or steal it from your Mom and try some weekend craft shows or farmers' markets (retail marketing - 5). Print postcards with photos of your work, and pass them out to everyone you meet (direct marketing - 6), go with your Mom to the grocery store, put flyers on the windshields of all the cars in the parking lot (canvassing - 7). Can you think of some more? Work up to that 8 or 10 number, now track every lead, inquiry, and sale (units and dollars) for each of your channels. Run your business by the numbers, evaluate your product, channels, and everything you do by the numbers. Don't forget to track costs by channel too. If one channel is more expensive, by say 1 or 2 percentage points, but generates 40% more sales it just might be a winner!
Congratulations on your new venture! It's exciting, and I wish you all the best. Don't hesitate to write if you have any questions. Never forget that the business side requires as much, if not more, creativity, and art, as the production side. Have fun with the business side, there's nothing like a little jingle in your pocket that tells you, that the market has spoken, and you sir are good enough!