No script is a pain to begin with, but you come to find out that google and facebook are everywhere constantly watching. It's incredibly unsettling.
Here is the source code for ublock: https://github.com/gorhill/uBlock which is GNU GPL v3.0
Adblock is run by Wladimir Palant's Eyeo GmbH. It used to be an open source project but was rewritten to what it is now and is tied to "acceptable advertising" policies and is run by a for-profit company. As always, if you aren't paying for it, you should be asking who is.
Without the preset lists of filters, this extension is nothing. So if ever you really do want to contribute something, think about the people working hard to maintain the filter lists you are using, which were made available to use by all for free.
You can contribute by helping translate uBlock Origin on Crowdin: https://crowdin.net/project/ublock
It's why we want to be good users of open source and contribute back, whether that's donating or helping write documentation, manage issues, etc.
The cost of open source is the direct cost - what it takes to build an adblocker in this case. The cost of a for-profit product is the direct cost and the profit margin - a higher number in every situation. Instead of the for profit company paying that, it's some external party and if that isn't you it's.. well, still somebody. As the saying goes, if you aren't the customer, you're the product.
uBlock Origin is many times better (and faster)
This is not NoScript's fault of course. Some websites are including 20-30 different domains (check out maperformance.com for example) and picking and choosing to get something to work is a nightmare.
Another option is to use another web browser for online purchasing.
jomashop for instance...