-just takes a % of the the transaction fee, no 30 cent flat transaction fee (even if you can batch)
-user can remain logged in like Stripe
-fully white label
Finding Stripe the best so far...
i was using stripe before, just switched over to Paddle.com payments. its a 5% flat fee, ends up being cheaper for payments under like $10 bucks roughly. I didn't actually choose it for that, were using it because it amalgamates multiple processors - they become the merchant and pay you out monthly. Preferable for us but not for everybody
I use Stripe for everything, my reasoning is that the ease-of-use outweighs the transaction fees in the long-term. Pro tip though: you can easily get around the flat fee impacting your micro transactions by batching the payments. Since it's micro transactions I assume your users don't pay just once, but spread out purchases over time. Save them as a customer or subscription and charge them every week or month instead of instantly: https://support.stripe.com/questions/does-stripe-support-microtransactions-and-will-my-fees-be-the-same