This would be fixed if bitfinex just charged 1 hour interest for 0-59 minutes 2 hours from 60 - 119 minutes etc... Please implement this immediately!!
I agree.
A "warning" might or might not work for this person, but he surely won't be the last one discovering this strategy.
So, I would too suggest a minimum lending time paid. One hour might even be too little, as this is still cheap enough for this malicious tactic.
How about a "x% of total lending time" as a minimu,, which is immediately paod upon taking the offer? That would make it more expensive to wipe out 30 day offers. And would be an incentive for people to actually make 30 day offers too.
Ente