Trust me I agree..... and as for "ruining" the market.... get serious.... heck in Japan you can get all the bottles of dye you want..... YOU CAN BUY them... Yes that's right.... you can buy a token and get more than one bottle of the OLD original good dyes...
Meanwhile.... we are stuck with wasting 500 lockdowns on single use dyes... *begin sarcasm* "Oh JOY!".... *end sarcasm*
*glares*.... I just want to know who's lazy bright idea was that? And why? For pity sakes it's just plain ridiculous.... At the very least you could have given us the option to turn in 10 of the same color and get a 10 use bottle.....
I think EA Japan has run a few limited-time only promotional events during which you could buy a token for a set of 50-use Tokuno dyes. I don't think you can just go to their web site and order the token any time you want.
Would it work for you to place a couple of boats and put the keys in a centralized location and then use the boats for storing the dyes as you collect them? Four boats would let you store 500 items. You'd have to refresh them every couple of days, but that may be less frustrating than clearing space in your house and would eventually get tiresome enough that you'd actually use the dyes, turn them in, sell them, give them away, trade them, etc.