I make Mac utilities at https://fadel.io/ and iOS apps ( https://podbuddy.app/ ). I’m at $4k/month and revenue is growing. I do iOS consulting as well, but I’m inching closer to going indie full time.
1. After entering my credit card details, I'm redirected back to your site without any message (I did receive a confirmation email a few minutes later)
2. It's a nitpick, but there's nothing I dislike more than forcing me to convert to my local currency. First the exchange rate is much worse than what my credit card charges, second I lose out on miles.