I don't really grok products like this.
If you have a fundamental disagreement with a platform, continuing to engage with it, even through a condom, is still perpetuating it. It's maintaining that platform as still important and integral, and a place that others should continue to engage with. It's telling advertisers that it's still a place that's worth their money to maintain a presence on. It stymies the momentum in shifting to an alternative; why put the effort into a new service if people are still seeing your posts?
It's like pirating Windows instead of moving to a different OS. You're still perpetuating the MS hegemony and telling software developers that Windows is the platform they need to develop for.