Hello,

We have similar app https://www.odoo.com/apps/modules/11.0/portal_user_join_invitation/

Regards,

www.probuse.com

Did you find something that works?

Have a look here - maybe it´s working for you:

http://vitraining.com/mlm-odoo-features/.

IMHO it´s not the perfect solution for setting up an MLM-Company and I would suggest to evaluate the possibilities in connecting your Odoo with a real good MLM-Software: http://www.internetnextstep.com

Please keep us updated about your decision/solution! Thanks! 

EDIT:

Here is one solution more: http://www.softcream.pl/tag/oddo-modules-request/

ttp://vitraining.com/mlm-odoo-features/

for this one would you send me demo version first then i will have a look on http://www.internetnextstep.com if it integrated with odoo 8