Promote your link with instagram | How do you do that?

Hee guys

Does anyone knows these thing:
-maximum ammount of accs with same link
-how do you to pass them??

And I really want to hear how your promote your own affiliate link or what so ever

I have made some experiments and the results where great I have now 40 accs all promoting 1 link and all working together
They all reach more then 4000 new people everyday!

I have my apache setup so that all sub domains display the same page. So then for each account I can do ***.domain.com and it will show the correct content.

This helps to keep more unique domains for account + easier to track where the clicks come from.

How do you set you apache to do that.. using the control panel or ?