Hello there!
As you may know, I have announced @bscbridge about a month ago and so far, it has been working more or less without an issue. (Further explained below)
After the release and sudden popularity of Polygon (formerly MATIC) I have decided to also create a bridge for Polygon, aptly called @polygonbridge.
The drill is the same as BSC Bridge, send it >10 HIVE (not 20, MATIC fees are a lot cheaper) and you will receive MATIC (minus fees, same as BSC Bridge) on Polygon chain.
The BNB > HIVE (for BSCBridge, after my development, version 1 of this gateway, succumbed to issues) and MATIC > HIVE is currently work in progress, and I am expecting to have it finished soon™.
That's about it. :)
TLDR: @polygonbridge is released, it doesn't have too much MATIC as it is a WIP at the moment, UI later. MATIC > HIVE and BNB > HIVE will be fixed and released soon. No UI yet, just send >10 HIVE to @polygonbridge with your address in the memo.