Donate to Signal
I have Signal as my smile.amazon.com recipient. It's not a lot but it averages to a reasonable monthly membership app cost. Note: your purchases have to be done through the smile.amazon subdomain to be eligible (for mobile apps: <a href="https://www.amazon.com/b?ie=UTF8&node=15576745011" rel="nofollow">https://www.amazon.com/b?ie=UTF8&node=15576745011</a>)