You had an absolutely free service built on top of ad revenue. Now that free service has to pay for itself (due to investor or executive pressure). They are charging what is arguably around the same price point as alternatives with high feature parity.
Google isn't "killing" anything, they are just asking users to start paying for it. Perhaps that loses them some users, but they are clearly after something else here (revenue, maybe they have data on how paid users behave differently, perhaps spam/bad actors are a concern on the free plan, idk)