if I purchased the Virtuemart bridge to sell templates through Virtuemart is it still necessary for me to purchase "buyQuota" to sell templates through the Virtuemart bridge?

Please a "Yes" or a "No" will do.

thank you.

YES.
This plugin works with JMS "Billable Website" functionality that can be used when you have purchased Website Quota

Buy Quota is a totally independent functionality that can work without VirtueMart when you want to use the customistion script in the menu defined for the front-end..

The Bridge plugin is a product that allow automate this customisation for website order processing using VirtueMart.

As we are also using VirtueMart to sale our product, we have not found the way to combine the sale of the Plugin and include a small quota.
This is the reason why you also have to buy the quota independently.
The website quota is also something that is ordered from a registered JMS.