Haven't even heard of it previously since I just got into the hobby from 2018.
Was that below $50? Saw it at a FB forum , it looks very similar physically to the VP although TWSBI claim that the sealing contraption is different to avoid patent issues.
Not sure if Platinum could avoid a legal dispute with Pilot with the Curidas.
I'm doubting there'll be a legal dispute. Someone on reddit commented that likely Pilot's patent expired, so now Platinum is back in on the clicker-fp action. After all, they released one ages ago and if I remember right, had to withdraw it because Pilot was suing them.
I don't think they went into the clicker-fp market again without being sue-proof this time and I'd imagine that the speculation is right, Pilot's patents expired. Platinum was likely working on this for ages, biding their time and adjusting their model through market watch until they could release it without legal troubles.
I know none of this for certain though.
I wonder whether and/or when Sailor will strike with a clicky-fp, the Big 3 are very competitive, can't imagine one of them not having such a unique model and levelling the field alongside the other 2...