Bought into both back in May because I wanted a spare in case one stopped working mid-campaign - had that happen with a different card in 2022 and it cost me a week I didn't have.
A month on and the numbers are lopsided. Everything through privcards cost 2% and the card was a dollar fifty. Everything through solcard cost 5% and the card was ten dollars. Same merchants, same purchases, both went through every time, neither declined once.
So the reliability argument is a wash and the cost argument isn't close. What am I missing - is there a reason people keep the solcard that doesn't show up in a month of ordinary spending?