If you have a problem solved by software, pay for it. They’re not a charity. If you’re just using without giving back you have zero standing to feel let down. Feedly is a SaaS, not a foss project. They have bills to pay.
Foss project also have bills to pay.
I don't know Feedly's history and whether it was originally Open Source or not but plenty of people decide their popular FOSS tool could be paid-for, at which point it is common to disenfranchise the people who made it popular in the first-place.