They did. RJET is the North American Launch Customer.

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Launch

On 13 July 2008, in a press conference on the eve of the opening of the Farnborough Airshow, Bombardier Aerospace announced the launch of the CSeries, with a letter of interest for 60 aircraft (including 30 options) from Lufthansa. The final assembly of the aircraft would be done at a new assembly facility to be built beside the existing one where the CRJ700 and CRJ900 are assembled in Mirabel, north of Montreal.[12] Ghafari Associates will work on redeveloping the Montreal manufacturing site to accommodate CSeries production.[13] The CSeries aircraft will use the Rockwell Collins Pro Line Fusion avionics suite, an integrated cockpit system made up of 15 inch displays, with comprehensive navigation, communications, surveillance, engine indication and crew alerting system (EICAS), and aircraft maintenance systems.[14]
The CSeries is designed for the 100- to 149-seat market category. This market is estimated by Bombardier at 19,333[15] aircraft representing more than $250 billion revenue over the next 20 years. Bombardier expects to be able to capture up to half of this market with the CSeries, currently projected to enter service in 2013.[1] First flight for the CSeries is expected in 2012.[16]
Mongolian airline Eznis Airways has a letter of interest for seven CSeries. Qatar Airways had previously been in talks with Bombardier, but broke off talks after disagreeing on terms.[17] An unnamed lessor was understood to be in talks for 40 aircraft.[18]
On 11 March 2009, Bombardier announced their first firm orders for the CSeries. Lufthansa, who originally had signed a letter of interest for 60 aircraft, firmed up an order for 30.[19] The aircraft will be operated by Lufthansa subsidiary Swiss European Air Lines. Bombardier also announced that the C110 and C130 were being redesignated the CS100 and CS300, respectively.[20] On 30 March 2009, Bombardier inked the second CSeries order, with airliner lessor Lease Corporation International (LCI) of Dublin, Ireland ordering 3 CS100s and 17 CS300s, becoming the launch customer of the latter.[21] LCI also hold options for a further 20 aircraft.[22]
The CSeries program has several major suppliers including, Shenyang Aircraft (centre fuselage), Alenia Aeronautica (horizontal and vertical stabilisers), Fokker Elmo (wiring and interconnection systems), Goodrich (flap and slat actuation systems), and Rockwell Collins (avionics).[23]
Republic Airways Holdings ordered 40 CS300 aircraft with options for an additional 40 in February 2010.[24] In March 2010, EasyJet stated that the company is having “ongoing discussions with Bombardier regarding CSeries.[25]
Deliveries of the CS100 are expected to start in 2013, and CS300 deliveries are to follow a year later.[26]