The 50 click minimum before you can purchase referrals should be removed as it is really useless. I respect the requirement when it comes to cashout as that gives the admin ample time to make sure the member is not using any cheat methods.
When it comes to buying or renting you already have the daily click requirement in place before you can earn from those referrals which makes the click requirement before hand redundant.
If the member wants to invest into the site right off the bat they should be allowed to as you still have the 100 click requirement before the member can request a payment. So if they do happen to be using auto clickers or other cheat programs they only stand to lose even more money.
It is funny that you have that restriction in order for the member to spend money on the site but not to actually start referring other members on their own. What is the big deal with allowing us to recruit people right off the bat but not to actually purchase them which helps the site with more investments.