@Phyxis it is three things:

1. the cost for non-corporate attendees being $949 by default, especially when many corporate attendees have significantly discounted tickets because their corporate employer is a sponsor of LF
2. if you are an indie OSS maintainer, then you can in theory get a discount code as a “hobbyist” if you go and ask for one, this is demeaning to OSS maintainers
3. referring to private individuals who are involved in open source as maintainers as “hobbyists” is also just directly insulting

but hey, this is the same organization who issued a policy that everyone has to have a badge with their government ID name on it during COVID because it had to match their health records, despite this being harmful to transgender people and others who go by names other than their government one.