Rclone is a pure open source for love-not-money project. However I’ve had requests for a donation page and coding rclone does take me away from something else I love - my wonderful wife.
So if you would like to send a donation, I will use it to buy flowers (and other pretty things) for her which will make her very happy.
My paypal.me link https://www.paypal.me/nickcw can be used to send money if the donate button doesn’t work for you (eg you live in Japan), or if you prefer to use it.
If you would prefer to express your gratitude by promoting the project, or helping with it, I’d be over the moon with that too!