I'd given up on lemmy because every so I had tried was unfinished and unpolished. I tried sync and finally felt like the user experience wasn't getting in the way of content.
I'd love to support foss, if a genuinely comparable experience existed.
I'm glad to say that sync has revived my interest in lemmy.
I think the pricing is fine if the quality matches it. Considering how much time we spend on our phones it could be great value for money.
I'm very curious to see how the advertising option works out for you, as currently I'm not aware of any lemmy sites with sustainable finance models.