What are you saying? It is locked behind donating, regardless of how you're donating. It is a donator benefit. Something like bank spaces should not be locked behind a donator rank, but I understand that they want to make money and this is a business. My suggestion is that they increase the bank spaces for default accounts and then scale upwards from there. It wont devalue the inevitable 1k$ donation you're going to drop on yet another RSPS.
They could easily change the bank space amount to something like: 500, 700, 900, 1100, 1500 & 2000. I doubt they'd lose much if any profit and it would be much less scummy.
There's no reason for any player to be against a suggestion like this as everybody gains something from it. I don't want a donator icon or other benefits, I just want to actually be able to play the game without having to drop items every time I open my bank.
A little reminder that F2P OSRS has 400 bank spaces, there's no reason to have 350 as the default amount.