Here's a million dollar idea for LEGO Group (or any third party): make and sell a LEGO sorting machine. It should be portable enough, and flexible enough for wide ranging of application. I think it can sell loads of them.
Or just have them in Lego stores. People come and hand off their buckets. It sorts and bags them. Emails you the inventory which you can upload to bricklink to purchase missing pieces, etc. It’s really a great solution and gets people in the stores.
And considering the time it saves for people it’s more than a million-dollar idea.