Charla Questions

Hi,
How do you stack the codes? Can't follow the directions below as there is no such option:
Stacking Instructions
After you have signed up and redeemed your first code, copy the redemption code above to grab your next code.
Log into your account on the partner's website.
Visit this link: https://app.getcharla.com/billing.
Click "Increase Seat."
Paste your AppSumo code in the code field and click "Add Voucher."

Does this tool support all types of websites? For example, websites that were built from scratch, or is it limited to platforms like WordPress and Magento?

previously bought Tier 2, do I just buy more tiers to increase my number of seats?

Good app so far..... However, we're not receiving that many chats. And at the same time, I am receiving a lot of email notifications for each chat we do receive. I think each chat sends me 3 or 4 emails: transcripts, alerts, notification that it's been answered, etc. Basically, I'm getting flooded and it's hurting my inbox. How do I turn these off? There is no option in the profile "notification" settings and I can't find anything in the help/support page. Need to end this stream of unnecessary communication quick!