This is extremely provoking to me.
Amaury calls Ryan X Charles a quitter, and he is lying.
MoneyButton is going at full speed. Yours is working, but not a priority for Ryan's 3 person company. PayMail is a good protocol adopted by several wallets where Ryan has contributed a lot. If you have an internet domain, you can give people PayMail addresses.
Ryan quitting his PhD, if true, is not relevant. I did the same, and quit my PhD in physics to pursue other goals.
Ryan was a pioneer in trying to use payment channels when core fucked up the max blocksize. And he tried and failed with Litecoin to solve the scaling issue for his usecase.
Ryan has true grit, and Amaury is just a cry baby begging for more money.