Good call. It's been a minute since I actually donated. I think I used to have it on recurring and then something happened(?)
In any event, two notes:
1. A compromised PayPal has a slightly more limited range of exploitation opportunity than a credit card. Also, PayPal information is stored on their servers, where credit cards could possibly be stored on the site of whatever vendor you're using. Since these vendors are hit with various cyberattacks on the daily, the more your credit card is out there, the higher the likelihood it'll wind up on a dark web forum someday. It's one point of vulnerability at PayPal and x points of vulnerability using a credit card, where x is the number of sites that store your credit card info.
2. I see that abiding by the code of conduct is stuck behind an asterisk. I feel, as a fan of the New England Patriots, that I am duty bound to ignore asterisks where they are found. So I will not be adhering to a code of conduct....I haven't read it anyway