You should start an email writing campaign to get another BtM and another one to get them to stop making Hatchet. Maybe an internet petition would work too.
Probably because Adam Green is a fairly shrewd filmmaker and his Ariescope Pictures is responsible for financing and releasing the Hatchet films (along with his other work). Plus, he's kept himself high profile with fans. He's at Frightfest pretty much every year, even when he doesn't have a film to show, and his Movie Crypt podcast that he does with Joe Lynch is very popular too.
On the flipside, I couldn't tell you who is the director of BtM.
BTW, the reason there's a 4th Hatchet movie is George Romero. Green told this story when he introduced Victor Crowley at Frightfest; he was at a convention on a panel with Romero and they were chatting. Romero asks him "When are you going to make another Hatchet film for these kids?" and Green replies, "I'm not. We killed VC in part 3. It's over".
Romero replies, "Look at all the Hatchet t-shirts out there in the crowd, look at the tattoos. There's as many here for you as there is for me. Hatchet isn't yours any more, it's theirs. You owe it to them."