One way to think about CC debt: if you fund your startup with credit cards, you need to guarantee that you'll grow earnings by at least 20%/year, just to keep up with interest charges. If you can't do that, you're personally on the hook for any shortfall, and have to make it up yourself out of future job income (after compounding, no less).
There're very few startups where revenues are certain enough to take this risk. Most likely, your startup will never make anything, and then credit card debt for a startup is no different than credit card debt for a spending spree. That's why startup founders are wary of debt financing. If you can guarantee that level of earnings growth (perhaps you have customers already lined up, and just need to deliver on a well-understood technical problem), then it can make sense.
There're very few startups where revenues are certain enough to take this risk. Most likely, your startup will never make anything, and then credit card debt for a startup is no different than credit card debt for a spending spree. That's why startup founders are wary of debt financing. If you can guarantee that level of earnings growth (perhaps you have customers already lined up, and just need to deliver on a well-understood technical problem), then it can make sense.