It probably stems from the huge success that the Super Dungeon Explore kickstarter was, that Soda Pop thought they would get similar numbers. Sadly it didn't turn out that way! However as we're seeing, they are super good at communication with customers, so I think with these changes in the stretch goals, they've adjusted to a lower forecast based on demand, and will run out the models they have made and ready at a reasonable time and get about 500-600k out of the project.
Also, the Relic Knights kickstarter was run by CMoN, which has it's own...way.... of doing things.
Speaking of SDE, looks like my set of Forgotten King will be here by the 10th of April! Huzzah!