this kind of thing could be mitigated by having transactions have a 1-6 block maturity after confirm. instead of using 'economics' to cost people out of utility.
not gonna help because they are not spamming with 1 address or with small amount of funds. they have always used hundreds of addresses (both when it was 10K satoshi with 10K fee and now as you can see in that address) and they have a large amount of funding. and a 1
BTC can be divided up to lots of small amounts. so they wait 1-6 or whatever number of blocks and then spend it and move to next batch.
but imagine it this way. instead of 100 addresses sending out and respending every 10 minutes. they have to wait an hour.
imagine if they tried to respend right at that 6th block. the next maturity is 2 hours..
where as everyone else that only spends once or twice a day, or week or month never gets maturity locked out, because it matures before they need to respend. but know they can respend because the waiting time is AFTER confirm.. thus they know they have been paid. instead of the current setup that delays due to spam leave them waiting before confirm and unsure if they will be even paid..
thus ethical people can spend when they want and malicious people are ending up having to wait.. and its all done by code rules.. not 'fees'