Alot of people say Thatch is edward thatch. But its actually edward teach aka blackbeard. Teach/blackbeard is based on teach/blackbeard. Thatch has no relevence to any real world pirate that im aware of
Based on what I read from other forums, I think Blackbeard have multiple personality that is the reason he's able to get 2 DF without problems. And he might get another one or already have based on his 3 skull flag.
Well, here's my theory. I think the fact that Luffy is the son of the most wanted man on the planet "Monkey D. Dragon" is enough to stop them from making him Sichibukai.
Secondly, if there's a once-in-a-blue-moon chance that they had offered him to become a Sichibukai, then without any doubts Luffy would've refused it because he does not want to ...
He didn't eat them because he didn't know what Devil Fruit they were other than that they were Zoan type, so he was scared to take the gamble. He wanted to eat a powerful fruit that he knows before eating; that was why he refused to eat one and gave them away.
If he eats one, then it is his one and only chance and only that Devil Fruit power can be used in ...