According to Chris Johnston of TSN and The Chris Johnston Show, Skinner snubbed the Toronto Maple Leafs who also made a similar offer to him in free agency, electing to sign in Edmonton.
Skinner is coming off a buyout from the Buffalo Sabres and would definitely add some pop to both the Leafs and Oilers lineup. Skinner is from the Toronto area though so it is rather surprising that he would choose Edmonton over his hometown team. However, with McDavid and Draisaitl on the Oilers of course that is appealing as well.