50 million rshares. I don't know where to find information about rshares... but that comment says it's a vote of 0.13 BLURT.
So payouts between 0.01 and 0.12 BLURT are getting dusted?
Imagine someone paying a 0.077 BLURT voting fee to generate a 0.12 BLURT payout (0.06 BLURT curation reward)... this probably never happens.

I notice the Blurt FAQ says something the Steem and Hive FAQs don't say: "Every vote has an effect. If you have very low Blurt Power, or have voted with a very low weight, then it may be that the value of your vote is below 0.01 BLURT and hence may not show in a post's pending rewards. The precision within your wallet is to the nearest 0.001 BLURT, so it may still have some value."

So every vote has an effect, and has value as long as it is above 0.001 BLURT? I hope nobody is paying 0.077 BLURT to make votes that are paying out 0.001 BLURT. That is $0.0000035.

Even if votes up to 0.12 BLURT are dusted, that is $0.0004, or 50 times smaller than the $0.02 cutoff on Steem and Hive.