That’s pretty clear, yes.
You’re, let’s say, dCS. Your entry level streamer is around $4000, and is a beautifully finished piece of kit (seriously, check one out if you can). Currently, you control both your software and your hardware. Tough luck for you, RoonLabs listened to some dude on their forum who thought that everyone should pay for the software he likes to use, and now asks for 5 or 10% of your retail prices or whatever for integration.
You’ve got two options: tell your customer “listen, that $4000 device is going to last a couple of years (we’re not talking about marketing “'till the end of time” according to said Roon Forums user), and oh, yeah, you won’t be talking to me if you have a problem with it, you’re going to be dealing with this company RoonLabs if you have a problem setting it up. And you’re going to be paying a yearly $120 for the privilege. Oh, and if RoonLabs goes under, well, tough luck, because the licensing fee we paid to Roon means we can’t afford the extra guy to write our own software stack that’d allow you to use UPnP in case they went down”.
Or option two: you tell Roon to go screw themselves hard.
Which is it going to be ?
No I have not. I’ll repeat slowly: implementing Roon has a cost. Roon making manufacturers pay for the privilege would be bad for Roon’s bottom line. Your original post was not thought out.
Because Roon’s endpoint software is free, Raspberry boards allow for very cheap Roon players is probably why that was mentioned. Instead of paying (at least) several hundred per “zone” like would be the case for something from a hifi manufacturer, you can build your own for tens of dollars / euro.