A: Hi there! Thanks for reaching out.

Please note that it's only possible to stack a maximum of six codes, so even if you purchased more than six, it won't be possible to add the additional codes against your HeySummit account. However, you can create a second account should you want to with those additional codes.

So, in short, there is no benefit in stacking codes beyond tier six unless you want to create multiple HeySummit accounts.

Hope this helps; just let me know if you have any further questions.