CDuMez

Recurring donations! Nice addition. That's for 7.1 only...and I'm hoping it will also come to 7.0 sites (or that 8.0 will drop soon, and have the features I need).

There is a way to get "around" this (not really sure if I'm getting around it or just using it correctly). 
For example, at my store, I charge $8 for the first item/box and an additional $5 for each additional item. 
In the shipping rate setup in Squarespace, this looks like: 
Flat rate: $3 per order, $5.00 per item.
This adds to $8, which is my "standard" shipping fee, and then adds on $5 when someone adds an additional item to their cart. 
So for your mugs, you would want to do: 
Flat rate: $3 per order; $2 per item/mug
This will add to $5 for the first mug, and then will be an additional $2 per mug added to cart.
Hope this makes sense.

Please also bear in mind that carrier calculated shipping is NOT available outside the US. The rest of the world cannot use it.
 
*It's also important to remember that the carrier calculated shipping feature cannot be used with negotiated carrier rates. It always uses the full RETAIL rates.

Thank you tuanphan! That works perfectly! If I may presume to aske for more...do you know how I could center and italicize that text via Custom CSS?

You can use this code to Website > Website Tools > Custom CSS
div#productList:before { content: "All sales are subject to approval at the home office in Wisconsin."; display: block; }

You could always put the code into the home page header code injection within <style></style> tags to just target the one page.

Try this Custom CSS:
#collection-61621b4cde18954468c81b0c { .transparent-header.collection-type-page .banner-thumbnail-wrapper { padding: 100px 0 50px; } } The 100px is the top padding, the 50px is the bottom padding.

Thanks for taking the time, paul2009...and for the thorough answers!
Responding to "You don't explain...": If you look at the main URL, you'll see that we add “12 new Hero Cards, 12 new Hero Stories…every month.” That would grow the site by 144 pages per year at a minimum.
I have considered the blog option but found the design limitations to be too much of a compromise. I also need to give each Hero story page a number URL (which is printed on the back of a physical card) e.g.: https://www.herocards.us/hero83. Those URLs are already printed on our cards, so I can't change the URL format. I'm not sure how to pull that specific URL off using the blog format.
I'll revisit the blog collection solution, as it may be the only possibility for staying on the Squarespace platform. If I can't bend that to fit my desired design and solve the URL convention...I'll have to (unwillingly) move everything to a different platform. UGH!
Thanks again for sharing your expertise!
-Craig

You don't explain why your site is likely to grow by 12+ pages a month but, as you hinted, using collections such as blogs is the accepted solution for this. 
A definitive answer won't be possible, but I think it's fair to say that this is unlikely, as Squarespace sites average way below 400 pages.
Your browser loads the content of the requested page, plus the platform's scripts and stylesheets to allow the content to be rendered correctly.
The limitations are due to the architecture design. When you reach over 400 pages you'll find the site difficult to manage. This isn't something you can change but, as I mentioned above, you can have many more items within collections, for example, unlimited blog posts and 10,000 products.

Thanks Paul2009. While I don't like the answer itself, I DO like that you responded and saved me the time of continuing to troubleshoot something that can't be changed!
Much obliged!

In Gift Card notifications, only the "Site Title" and "Linked Site Title" merge tags are available. It isn't possible to use others.
I agree that it's unduly restrictive but this is apparently by design rather than a bug. To raise a feature request you can open a support ticket with Squarespace Customer Care.
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