Roku is a one time payment … you can buy them almost anywhere. Some channels have monthly fees. Pandora has a free version for music streaming.
$ 15.00 mth for Netflix streaming.
I also recommend the ROKU - it’s versatile for the stuff I am already paying for. I use Amazon Prime video, Amazon Music, Netflix, my SIRIUS XM account from the car, etc. all on the ROKU. It can access all of the major pay TV (HULU PLUS etc.) and there is a lot of free stuff on it too.
The ROKU itself is just a one-time purchase and you can subscribe or pay for services as desired.
ROKU has no controls on it. If your dog chews up the remote, you can get another one from Amazon for about 10-15 bucks. (LOL Don’t ask.)
Yes, they do; but, they have a lot (and I mean A LOT) of ads/commercials between the songs. In fact, before I stopped using it, I was getting an ad after every 2 songs. I could go on my FM station and get a long play of songs on a regular basis w/o the ads. So, I bit the bullet and went to the "pay" Pandora, and I am a lot happier. No ad interruptions, just music. I listen to it most of the day when I am at home, so I consider it worth the fee.