You can support the USFA just by shopping on Amazon! The Amazon Smile program donates a portion of the proceeds of your eligible purchases to the charity of your choice, and the United States Fencing Association is one of the eligible charities. It doesn't cost you anything extra, just a minute of your time to designate USFA as your charity. Then, make sure you shop at smile.amazon.com (the same as amazon.com, but with the added bonus of the charitable donation) and voila!
Hey, we aren't telling you where you should shop, but if you shop there anyway you could be helping out the USFA at the same time for no extra cost or work. ;)
More info on the program can be found here: https://smile.amazon.com/gp/chpf/about/ref=smi_se_dshb_aas_saas