The investment option seems fantastic!
I think it's a shame that you eliminate that kind of remunerated account, since it gives a lot of play.
My thoughts

• Unify the acts "deposit and investment," which I will call "fund" so that the investment can be made tips and the deposits generate returns.
• The day the "fund" is used to make tips does not pay dividends.
• A maximum amount is declared for the "pool of funds" of X SBD / user. They have to be an amount that can be accessed in 24.
• Yields are 1/2 of those that are perceived by the other means.

To help the minnows more and to be encouraged to have their SBDs in @tipu and not in their ordinary portfolios
Reduce the minimum amount to make a tip.

These are ideas that come to me ... that may not be feasible.
Maybe you can think of something to maintain the investiment service a live.

Thank you for your attention and excuse my speech.
Regards.