They've taken $97.3M before: https://www.crunchbase.com/organization/etsy
Presumably they had some profitable years prior to 2012 or have maintained limited losses.
Either way, it looks like they're gearing up for some big growth in the next few years. They dipped into the coffers in 2014 and will raise a lot of money from this IPO, so they'll have plenty of cash to burn on fast growth. It should be interesting to watch!