Paige originally came on at the tail end of Michael Malone's disastrous second run in 2004 - Frank Valentini fought hard to get Mary Beth Evans for the role, but at the last moment ATWT offered her a contract as Sierra and she took it. Kimberlin Brown took the role for maybe six months and did nothing but fück Bo on his desk. At the time Paige was little more than a transparent spoiler for a Bo/Nora reunion Malone was never remotely able to execute.
Later, with Cady Huffman in the role, it seemed like they hoped Paige could supplant Nora - the actresses had very similar styles, and HBS was locked in a contract dispute with ABC which kept Nora in a coma for months. Only fan outcry saved Nora's life. Paige as a character never worked or went anywhere, but Dena Higley was obsessed with her creation Spencer Truman so that (along with the logjam BTS that allegedly kept the show from reuniting Bo and Nora for years) gave Paige a year or two more of longevity. No one cared about any of the Paiges, including the final one, Alexandra Neil from Texas.