I'm currently subscribing to two on OnlyFans who I also follow on ManyVids and Twitter (LikeMyAshe and ShannonMarieAnn). Both of them are $10/m for OF. I do this because I can interact with them on MV and talk about their OF content. You can also purchase stuff on both platforms but I find that too expensive (it adds up quickly). I was subscribed to another obscure (not one who posts here) Durham region escort on OF for about $7/m but she did barely anything. Another former Naked News anchor that I like (Kate Maxx, who often posts fairly explicit content) on OnlyFans raised her rate to $25/m and so I cancelled; but she did "deliver the goods" for that price, compared to others. I'm fairly new to the cam world (December?) but on Streamate the performers can be kinda aggressive at pushing "Private" shows for $$, and will block you if you just lurk. I get it, but don't like it (to a point). MV is MUCH more chill than Streamate (but SM has much more variety of performers; body type, age, etc.)
It's easy to cancel a subscription on OF. MV is free to join (and view live streams; but buy tokens and tip the ladies if you're gonna view them)
It's worth it if you think it is. Like I've described before, some guys can go to a strip joint and sit in pervert's row, just buying drinks, and not take the girls in the back for contact. It's kinda like that. (It ain't cool to sit there without buying drinks, just like it ain't cool to get MV and lurk a model's livestream without tipping some tokens to her; but you can do both [well, get one single drink and nurse it the whole time, at least])