I doubt no mass spam flooding, and for annoucements memos, the transfers are not fee and all paid i guess (min 0.001 HIVE + RC bandwidth). thanks.
It is a promotion service like many (ecency, peakd or others) incentivising community stick to HIVE Posting and stuff.
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Besides the above., it is also a vote-buying scheme which is unwelcome on Hive. This is not Steemit.
oh i see, but you do not attack services like ecency on HIVE ;)
https://ecency.com/