Hi,
Came accross this post, althought old i thought i could share some views.
Blackholing can be done with static manual config or remotely triggered [RTBF]. Triggering tag or sending blackhole routes with specific BGP communities to upstream ISP can trigger RTBF to discard a specific route.
Am not sure a rate-limit [policer] can trigger RTBF or blackholing.
Cheers,
Ashvin