I will be paying for the Kasumi DLC, the only reasons I haven't already is because I didn't realise that not all DLC was available through the Cerberus Network, which is annoying because I paid for a Collectors Edition to get all the DLC included, not to get a shiny case. However that is my own fault for misinterpreting the description of the CN ticket.
"Cerberus Network Membership Card - Once enrolled you will have access to exclusive in-game content and updates via an in-game feed."
Sadly, my eyes must of skipped right over the word EXCLUSIVE in there in my excitement over finding out I could already pre-order my copy of the game at such an early date. The other reason I haven't bought it yet is that I'm in my third year at university and thus I'm studying full time for my MEng degree and so I don't have enough money to go "meh, it's just a tenner."
Also for the people who argue that no quality DLC has ever been free, erm, Counter Strike, one of the most successful and popular multiplayer games of all time was released as free content with Half-Life, the Last Stand in Dawn of War II was released as part of a patch and Team Fortress was originally a mod as well. Yes, two of those are now sold as retail games, but that was only because they were so successful the developers realised they could make money out of them.