For those who use apps from Portableapps.com they might be interested in these discussion started by the lead developer regarding future developments.
https://portableapps.com/node/57721
Interesting. However when sites that display ads still need money it always baffles me they want to go a Fremium or Paid route when they could at least try the donation route first even if for a very short time as a test by placing a Donate button on every page. Although I do understand doing something subscription based for those willing to subscribe is a way the money keeps rolling in without relying upon supporters to remember to donate monthly or however often they intend to.