It’s almost not even fair to say they’re merely contributing back to the upstream bridges. Most of the bridges would not exist at all without the Beeper developers.

It’s also kind of funny that the section of their website you quoted still has language that implies you have to pay for Beeper when it’s been free for months at this point. The primary reason to self host Matrix at this point is for privacy and complete control. And self hosting Matrix is only free if you use existing hardware and I would recommend a cloud instance for most people.