I'm looking at EVE Online: Incarna at Steam right now. It says I get 30 days free (well, included in the game's price, really) and then I'll have to pay. It also says, that the product key won't work with existing accounts. I'd like to first get the trial (either the 14 days one from the official site or the 21 days one (I think it is based on an invite) that I saw mentioned at some forums) and decide if I like the game. Then I'd like to buy it on Steam. Do I get 44/51 days of play? Or does it mean that if I use the trial I am no longer entitled to the 30 days extra from the Steam title?
The game itself does not cost any money, you can download the client from the Eve Online homepage freely.
The price in Steam is exactly the same as the price you pay for the initial account setup and the first month of play when ordering directly from CCP (at least in my location). You don't get any benefit when buying from Steam.
A trial account is an existing account, and usually only one type of starting bonus can be attached to same account. Though I don't know it for sure, but I would not risk it and just get someone to send me an invite to get the 21 free days and then buy a subscription directly from CCP.