These are groups of 2−3 people who typically delegate two main areas to each other: modeling and visualization. If the team is experienced, handling fairly large tasks is not a problem, but they are unlikely to manage parallel projects.
Pros:
Market-bottom prices
Potential for high quality
Presence of a social shell: website\behance\instagram
Cons:
Long duration for task realization
Retention of some inherent risks when transitioning from solo specialists
Recommendations:
Carefully review the portfolio for quality
Such teams often work as subcontractors for agencies, which allows tracking the dynamics and level of work, and ultimately conducting competitive intelligence through the agency.