In many ways, Mastodon feels like rewinding the clock on social media back to the early days of Twitter and Facebook. On the consume side, that means that your home feed has no algorithm (this can be disorienting at first).
Practically, it means that you see only what you want to see and only see it linearly. You never wonder “why am I seeing this and how do I make it go away?”. Content can only enter your home feed via your followed tags or handles and the feed is linear like the early days of social media.
It’s not because Lemmy is FOSS it doesn’t cost any money. Infrastructure costs and the time invested by those that help the fediverse grow is a cost too. Be it the time invested by the people running instances or those writing custom ui’s, tools and yes even Lemmy apps. And if some people prefer to be compensated what’s wrong with that? You think the Lemmy devs are doing it for free?
I don’t see the relevance to my opinion that ads are bad, but it is an opinion that Lemmy developers also share. Also for the 1000th time there is nothing wrong with selling software. I just disagree with ads and data harvesting.