This should have been throughly thought before hand when the original staking was at 3% and it was already trading on c-cex. The question is why NOW?
NOW is always a good time to do the right thing. Staking was never 3%.
The original PSB and the PoSP hard fork that followed have 5% as the official inflation rate, but, because of how wallets are staking now, the actual inflation is 6%-6.5%.
Also, we found out that C-Cex is one of the only exchanges that actually stakes with depositor's coin; this is something we didn't know.
Making PSB a 3% coin will make it more rare and help price. It's just one aspect of the coin, but an important one.
The failure of one exchange because of its greediness entails you guys to tinker again the Interest rate of the coin? I don't think that is the right course of action.. PSB has been trading on c-cex since last year even before the swap has taken place and you just found it now since you notice that there is dumping of coins on that exchange?
If the exchange is already acting as an asshole then why stay with it? Better yet move away from it and look for better exchanges that acts professionally.
P.S: This is just an idea, why not stop the whole staking business and move PSB on Ethereum platform instead? And for the online wallet, you may still provide a staking feature on a lower rate for example 3% and locked on monthly basis.. or you can provide some fee basing on the amount of PSB being deposited for staking.