My opinion is that in the first 30 days it is not necessary to invest money - unless I associate it does not want.
In the second month, but can be invested, but on condition that the user is already advertised and have at least 2 new active members.
Anything less than that - I would not advise any investment!
A good financial budget would be:
- $ 36 for 125TC
- $ 35 for advertising in the media
Good luck!