They DID annouce (for about 24 hrs on their website) and send e-mails, that their new X3 hub was out - and this would "eventually" support local Matter - They even sent me an e-mail - Then they pulled that back, and said the X3 HW was just out for Beta (limited to select testers), and it's major claim to fame, was local cellular support, a local batter backup, and I think improved WiFi (5g?) support - They said, that this NEW X3 hub had the proper resources and would be required to run local matter, and they know folks are clamoring for that.
But , and this is a big but, they said the new Matter FW wasn't ready, and would be released by EOY - You can take that however you want, given the past 2 years of progress (or lack thereof) - The throttling info is news to me, but I take that as just trying to stem abuse of their API, given the MQTT linkage, there isn't a huge reason to poll all that fast - On a positive node they seem to be releasing lots of HW to support remote farm data collection, and apartment complexes.
Anyways, they are still alive, and seem to be making progress with a new hub (albeit slowly), but local Matter is apparently still on the distant horizon - I have about 4-5 Yolink sensors, versus 60 Zwave, and 20 Zigbee devices - So I use it for very specific use cases (I also like the usage of AAA batteries, versus coins), but in those use cases, it works well - Perhaps when Z-wave LR is out for the HE, I'll reconsider - but at least YoLink via cloud is an option that available today.
That all said, the slow grind to local Matter (I'm guessing they will be a Matter bridge?) does seems to be taking longer than expected..
See: YoLink Hub 3 available in yosmart store - YoLink - Universal Devices Forum - There are further links at the bottom, that lead to Discord discussions on Matter FW
And again, sorry for somewhat derailing the OP's thread