This is clearly a bad idea, because credit cards are not as ubiquitous everywhere as they are in the US. If they don't want to do their research properly to figure this out, then they should at least ask, e.g. by giving a proper, timely notice with some option to back out. A month is clearly not enough. It's not even enough time for people to look for other income streams as the current ones will inevitably be affected.

I really have trouble understanding decisions like this by companies that put so much focus on diversity and inclusion, but never really consider that other places outside of the US exist for many of their decisions. It frankly makes no sense to me to spearhead the effort to rename the master branch to main, but ignore that people outside the US can't sponsor projects without a credit card. The actual harm done by the latter is arguably larger and definitely more clearly measurable. It's very disappointing.