From the Pelgrane Press news page:
...until Friday, all margin on sales from Pelgrane Press products from the store will go to help Chris get back on his feet. DriveThruRPG will also give their royalty share to Chris on Pelgrane products.
100% of the price of download sales, and 50% of all physical sales will go to Chris. This is one step of several that 13th Age creators Fire Opal Media and Pelgrane will be taking to help out.
If none of Pelgrane's current offerings appeal to you but you still wish to help, direct donations can be made to Chris's Paypal account. His email can be found in the comments at the above-linked page.