It was necessary, the game was about to be finished and the creator needed to find a way to extend the game in order to further milk DRY the patreons and continue the endless development cycle. What better way than to remake it and start from scratch? The fact that there are people still supporting them is why they do this, so long as there are suckers who subscribe to this, it'll continue to happen and expect it again once the remake reaches v0.9 and a new koikatsu skin layout becomes popular. Remember that you or me, people who make smart financial decisions aren't the target audience, it's more like whale fishing for people who would buy into Kickstarter or subscribe on patreon.