This is because every penny I got can help pay down consumer debts and contribute to the marketing budget and future property acquisitions.Longer Am's are good for when you are recycling cash very actively.

Real Estate Agents as independent contractors are eligible to contribute to a Solo 401K, and invest in real estate. 

To make money in real estate you need one of three things, time to contribute towards deals/investors, deals, or money.

For cleaning, my lease says all shall contribute to cleaning every 2 weeks.

And of course if there is an empty bed room then it’s only fair that you as the landlord contribute the empty room  portion while it’s vacant.

Tony helped me craft my "WHY", a guiding principle that I used to quit my CPA job to buy large apartment complexes, a thread I continue to update - I quit my CPA Job to buy Large Apartment BuildingsSo back to your request, over the years I have transitioned from Certainty to Contribution.

Personally my view was, only contribute what the employer matches (free money).

You can contribute/transfer a property without selling it.

So obviously that is contributing to the violence in the immediate area. 

For others, it's to earn more to pass on or donate to charitable causes.