There are still a few populated servers. I boot it up every now and then when I feel like fighting through Monte Cassino again. I'm sure you can find legal copies still floating around. After installing through patch 1.61b (or whatever the last official one was), there is a community-made patch somewhere that gets the game (mostly) running on Windows 10 as well as merges the Origin and hard copy clients so that they can play on the same servers.