Thanks for your interest in donating, @zoh7ca . That’s very cool of you.
You’re right that the GNOME Foundation has an Open Collective account, but it’s not currently set up to receive donations. We did investigate using it in the past, but eventually decided against it - there were some technical/accounting issues that meant that it wasn’t practical for us.
Sorry if this is less convenient that you would like. Stripe is generally a low-friction payment option and seems to be working well for others. Just let us know if you have any issues.