Are you familiar with the Outstaff direction? Have you worked with it?

Yes, I am familiar with the Outstaffing approach. It is a collaboration model where a company hires specialists through an external organization (outstaffer) but manages them independently. In QA, I worked with outstaffed teams where specialists were officially employed by another company but performed tasks under our supervision. This approach allows flexible team scaling and cost optimization but requires clear communication and quality control.