I won't be using Etsy Ads again. First time I used it, I immediately got a sale. But every other time after that, nothing. And yesterday I had it running, and raised it to 10,000 impressions to see if that would help...and I ended up paying over $1 for only 600 impressions, in only half a day! The math just wasn't adding up, it seemed like a rip off. I may try it again someday, but right now it's not working for me.
I get more views from consistently posting & running my blog -
http://littlefever.tumblr.com - and from posting on Facebook (I post a lot of pictures and progress shots during the week, which seems to get more peoples' attention than just links). I also tweet and have Facebook linked to my Twitter so my Facebook posts automatically get tweeted which saves time.
And for fun I started a Polyvore account, which posts my sets to my blog -
http://littlefever.polyvore.com/ - I kind of try to keep everything interconnected, if that makes sense?
Those are all free, but as far as spending any kind of money advertising, the ONLY paid advertising I've ever had success with was through BUST magazine (I actually plan on investing in another ad with them soon). Much more expensive, but DOES yield results.