$0\mathrm{.}3$ points

Apple has open$-$sourced Swift so it can be used on development efforts outside its own products, and its broad efforts to encourage Swift adoption have made Swift one of the world's most popular and in$-$demand programming languages. This is an example of

Demanding value due to better programming efforts. as a strategy for competing in Network Markets.

Paying programmers to promote network effects.

Encouraging the development of complementary goods.

Maximizing the consumption of Apple products.