You originally bought an "almost finished" console game from the MS store whose publisher "telltale games" went bankrupt. The had licenced the game from TFP. There should have been at least one if not more further updates, but those updates and any further plans with that game died together with the publisher. A large part of the money you payed for the game went to telltale games and was probably used to fix their other problems and eventually to pay debtors. At that time the console version of the game had nothing common with the PC version anymore, it was a distinct game that was practically abandonware.
TFP later bought the publishing rights back from the bankrupt's assets and decided to create a new port to console, this time hiring the developers themselves and publishing it themselves, with another company as a hired publisher. TFP surely did get a share of money from the old console game but they also had to buy back the publishing rights and that seems to have cost a lot. All the new work to port the game again has to be payed, the publisher has to be paid, MS and Sony want a cut on each copy sold as well.
If you buy the game, you are not buying the same game again. If Sony gives out a license to a different company to make headphones just like theirs and that company folds you also won't get replacement parts from Sony or free upgrades of the hardware if available. Yeah sure, not the best analogy, but adequate.
Now if you still think it is a money grab, don't buy it. If everything above is true though then TFP had no alternative if they wanted to publish a new console version. They simply have to ask for money to finance the game port or they would be losing money on most copies sold.