I've still been using it since it's the best service (in my opinion) for simply tracking everything you listen to. Spotify does track the same thing but they don't really let you view the information the same way. For example, there's no way to view the list of your top artists ever like there is with last.fm (I just checked mine, it's: https://www.last.fm/user/[your username]/library/artists).
Hopefully the developers being unchained from CBS/Paramount can only mean good changes are coming to last.fm in the near future.
The last time I paid for LastFM was some time in 2009...but the home page just isn't clearly telling me what the service offers.
For me, many years ago Last.FM recommended this weird electronic band that I'd never heard of, with the strange name "Boards Of Canada". That Last.FM recommendation was responsible for introducing me to my 2nd most listened to band of all time (just behind NIN). 2026 is many hexagons, dandelions and an inferno later.
Today, we have Generative AI, generating an incomprehensible number of songs that no one will ever listen to.
I don't remember if I had to pay for Last.fm or not back then, but I'd definitely pay to have access to that old system.