Well, their next project seems to be f2p, which probably means it's multiplayer heavy.
Technically they could be making a singleplayer f2p game though, but those are pretty rare.
MONETIZATION EXPERT (f/m)
YAGER is currently seeking a talented and experienced Monetization Expert to join our pre-production team of yet unannounced title. The Monetization Expert will be responsible for creating and tuning our gameplay systems to maximize opportunities for thoughtful monetization. We want to offer our customers opportunities to personalize their game experience through micro-transactions without affecting game-balance or segregating our player base. Were looking for people who love the idea of working together in interdisciplinary teams within a flat hierarchy and a fast-paced and professional environment.
Responsibilities
Design, implement and balance certain gameplay features that support monetization from initial design to final polish
Develop monetization strategy and oversee day-to-day revenue management
Collaborate with the team to ensure the implementation of features into actual gameplay
Iterate, balance and tune reward systems based on feedback from team, QA and play testing during the whole production
Stay a up to date on competing games, focusing on new monetization strategies
Work closely with Creative Director and product owners towards the game vision
Qualifications
In-depth knowledge of cross platform games and micro-transaction based business models and desire to innovate and define new methods
Excellent analytical and problem solving skills; excellent ability to judge details vs. the big picture
Good understanding of the competitive landscape
Good understanding of full game development cycle
Superb written and oral communication skills (English)
Ability to work in interdisciplinary teams in flat hierarchy
Ability to deliver under deadlines and time constraints
Source:
http://www.yager.de/career/job_offers/monetizationExpert.html
SENIOR GAME SYSTEMS DESIGNER (f/m)
Desired Skills
Previous experience with Unreal
Experience with free to play title development
Experience with Scrum and Kanban production methods
Source:
http://www.yager.de/career/job_offers/gamed_sys_senior.html
To feed into the opportunity cost discussion, this might be a good example of that. Yager may very much be interested in making a singleplayer only game, but no publisher might be interested in signing it, so here they are.