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Also, just to clarify in case there was confusion - payments have not 'stopped'; they are just being payed in STEEM instead of SBD.

There's no link to an announcement. It's just the current state of payouts due to Steem/SBD supplies and market cap.

It doesn't exactly tell us what's happening now, but this is from August 20th, by @dantheman -

https://steemit.com/steem/@dantheman/steem-dollar-stability-enhancements