Due to the initial low popularity of the line the original concept was somewhat altered in 2006 with the line extended outside the administrative borders of the city through the Ursus district into the town of Pruszków to the west and diverted to the district of the Wesoła and the town of Sulejówek to the east, turning the service into a suburban commuter train which allowed people in the metropolitan area to quickly reach the city center and conveniently transfer within the city's public transit system. The revised formula proved to be very successful leading the city to take the purchase of all the shares of the company and purchase two more Newag 14WE EMUs. The popularity of trains run the SKM was also instrumental in the city negotiating a deal with the Masovian Voivodship to have Koleje Mazowieckie honour long term tickets of the Warsaw Transit Authority, first along the route of the SKM and eventually within the entire area served by the city's public transit system.