The encomienda was strongly based on the encomendado's tribal identity. Mixed-race (Mestizo) individuals, for example, could not by law be subjected to the encomienda. This moved many Amerindians to deliberately seek to dilute their tribal identity and that of their descendants as a way for them to escape the service, by seeking intermarriage with people from different ethnicities, especially Spaniards or Creoles. In this way the encomienda somewhat weakened Amerindians' tribal identification and ethnicity, which in turn diminished the pool of available encomendados.

Answer this question based on the passage: how were some of the indigenous workers able to escape the encomienda system? OK. Let's think. My stream of consciousness:
The important part for answering this question is: This moved many Amerindians to deliberately seek to dilute their tribal identity and that of their descendants as a way for them to escape the service, by seeking intermarriage with people from different ethnicities, especially Spaniards or Creoles. The answer is deliberately seek to dilute their tribal identity and that of their descendants.