Sammy wants to be 'friends' only for the agenda of then convincing the brothers to have one more tour with him and Hagar probably would also want one last album with Van Halen, even better if he could share the stage and the album with Dave and Van Halen because then it legitimizes to an extent their classic catalog with him. It's simple. Yes, it's not the money and it's not to be friends because they really are not, but to secure his legacy as a legit part of Van Halen which trumps anything else he ever did in his career and that notoriety has evaporated a long time ago. They simply do not play Van Hagar much on the radio, the songs are not consider classic. Popular music is fickle and short lived to an extent, even when you are considered 'legendary'. Really does not matter how shitty Dave sings now, if he remains the lead singer even in a retired band, Hagar will be forgotten and Roth becomes the only lead singer in retrospect... Dave knows this, and surely does Hagar who has to list his nickname 'the Red Rocker' on his social media because unlike a true nickname, he has to remind people of this while Dave ends up being the diamond which lasts forever