It seems like the ship has indeed sailed for Maine Mendoza and Alden Richards. Eagle-eyed fans spotted that Maine recently unfollowed her love team partner on Instagram. But Alden (for now, at least) still has Maine on his "follow" list.
Here's a screenshot of Maine's Instagram:
Here's a screenshot of Alden's Instagram:
Their fans also speculated that Alden's now-deleted Instagram Stories post, where he wrote the word "clueless," was his reaction to Maine unfollowing him.
Their respective fandoms were, as expected, shookt AF:
In November 2017, Maine published an open letter to her fans denying any romance between her and Alden. She then went on a hiatus from showbiz and only returned to her noontime show Eat Bulaga! in early January.
UPDATE as of 12:37 p.m.:
Maine just followed Alden again on Instagram and currently follows 279 accounts. Maine also tweeted her apology about unfollowing Alden and said that she accidentally pressed the unfollow button: "No bad blood here. Napindot lang talaga. Sorry na. Happy fiesta!"