Can’t really say it hurt, but I played Battlefield Heroes for a bit and it was a lot of fun for what it was. Kind of had an ‘old-school Battlefield’ feel to it.
Was sad to see it go, although I had stopped playing long before it shut down.
I honestly can't think of any that I am still playing when they die. Only stuff I truly played long term was Soul Calibur and Splatoon. Splatoon is still current, and I'm usually done with each SC entry after several hundred hours, and just move on.