Yea this seems like the best way to support the site tbh. Let people who can afford it pay for running costs in exchange for benefits that don't negatively affect free users. Much better than being beholden to people who have no interest in you providing a good service.
Fair reason to do it, not against it since they didn't do it retroactively or anything. Bit sad to see it go from something meaning tomorrow/art + home/country to just "invention" though. Lot of flavor lost there for people who know hindi.