I agree, enough to cover rentals, or maybe buy a card or two. At the end the funds would be going to asset owners, which is what the SPS team wants.
Alternatively an unlock system would be great, where at lower tiers, your earnings in credits corrolate to investment, but they can be small investments. We all know this game snowballs, but it's important to give people a taste. If i invest x, I can do y. oh so maybe i should invest a bit more.
right now, you have to make a big investment which is more than most people can stomach. However having a fractional investment system where the game encourages you to invest more in small quantities could go a long way. Much like those stock apps that invest your spare change and whatnot.