Money shouldn’t be a barrier to sharing photos.
I do however accept the creators need to make money and we want better content with no spam.
I feel these can be achieved through other means than simply putting a paywall. Please look into achieving this goal by looking at existing monetisation models that work and smarter ways that counter spam and encourage quality content.
I could suggest a few ways, as others have done so here, but I recommend looking into this properly as it’s likely the biggest barrier to the platform opening up to more enthusiasts