Debating if I want to get it for $10. I doubt I'd play it much and my roomate has it and he hasn't touched it since second week of launch and when I saw him play it, it just seemed meh. For $10 though I could get it and try it for myself. Decisions, decisions, decisions. If it was $5 I'd probably bite, but $10 is questionable.
Well FFXIV doesn't have any DRM (aside from what they might have) and it's on Steam. So I wouldn't doubt if GW2 goes on Steam at some point to promote itself with Steam's free advertising. By using the random Steam suggestions and just seeing it on there intrigues people and they might buy them. Not to mention they could show up in Weekend / Sales Events.