These include powerful mechanisms to prevent an altruistic absurdity such as donating one's labor to an employer.

Note that the employer in question might well be your own upload clan, which makes this near-analogous to kin selection. Even if employee templates are traded between employers, this trait would be exceptionally valuable in an employee, and so would be strongly selected for. General altruism might be rare, but this specific variant would probably enjoy a high fitness advantage.