Final answer:
The economic benefit to Penn in the crushing of the rebellion could include maintaining commercial success and stability in Pennsylvania, which William Penn founded. Ensuring peace with the Native Americans also provided security benefits and avoided defense taxes.
Step-by-step explanation:
The economic benefit to Penn in the crushing of the rebellion refers to the advantages that came from maintaining order and stability in the Pennsylvania colony, which William Penn founded. Given the context, it's not entirely clear which specific rebellion is being referred to; however, the information provided discusses the period after Penn's death when his sons and other colonists began defrauding the Indians out of their land, eventually leading to conflict. The question might imply the benefits of suppressing any such rebellion that threatened the peace established between European settlers and Native Americans under Penn's fair treatment policies.
Under Penn's governance, peace with the Indians allowed for a commercially successful colony, helping to attract more settlers and strengthen the colony's prosperity. For Penn, ensuring harmony within the colony preemptively avoided potential rebellions, which could have disrupted this commercial success. Additionally, tribes along the Susquehanna River acted as a buffer against French incursions, also providing security without the need to levy defense taxes, which was again economically advantageous for Penn and the colony.