I am not saying this applies to your circumstances but just recently, in our family, we have had similar approaches from grandparents who have insulted, betrayed and otherwise caused a LOT of grief to their daughter (my son's partner) and her son.
They too hinted at largess and benefits (they are seriously wealthy) - if their daughter toed the line and let them see their grandson more often. (he has refused)
They love this little boy so much that they never fail to tell him what a terrible person his Mummy is and what a disgrace he is for loving her.
A few years ago, when he was 5, they evicted Mum and son from the home they'd lived in 14 years and was the only home the little boy knew - and why? Because she didn't do as they ordered.
They have not shown one jot of genuine love or care for him, or their daughter and in my opinion, it is beyond them to do so, even if she jumped to obey every ridiculous order they gave.
She tried this when she was young and they still weren't satisfied, still insulted her and tried to make her do everything their way...and punished her when she didn't.
Such people are incapable of love - they just want power and control.
It may well be that yours are the same.
If that man had come into my house saying the things you posted above, he wouldn't have had time to say the next sentence, he'd have been shown the door and told, as he exited, what I though of his "offers".