Merely asking the source of these edits.

Google Maps, as you have linked above is absolutely not allowed as a source in OSM.
These edits will need to be reverted.

https://www.canadapost-postescanada.ca/cpc/en/support/kb/company-policies/terms-conditions/legal-terms-of-use-and-conditions says effectively that the site is for personal use so therefore does not include adding to OSM which is licensed to be used for any purpose.

Openstreetmap can only use opendat, or data we have specific permission to use.

The obvious gold standard is 'I went there and I saw it'. Just because something is on a website intended for personal use does not make it opendata.

"brand=Costcutter + amenity=post_office?"
Yes if you are mapping them as a single node. More correctly the shop should be mapped as an area with a post office node inside it.

"standalone counters"
The counter are separate. You do not wait to pay for a few beers behind someone collecting their pension.
The post office counter will have the expected security and away from the busy part of the shop to provide privacy.

https://www.anpost.com/Terms-of-Use particularly paragraph 3.

Did you obtain permission to reproduce that information as otherwise you are in breach of the terms of use for the website.

Hi
Have you really fixed this?
You have removed a shop tag but given no explanation of why. Did you go to Paris and stand outside?
Alos where did you magic the check_date from?
Cheers Phil

What is the source of this post partner edit?

Cheers Phil

Hello
Welcome to OSM.

We don't use post partner in the UK, post offices within small shops are considered post offices, you can do most of what you can in a larger post office so they really should be amenity=post_office.

They are standalone counters within the shop, usually with their own opening hours. It is more usual to map them as a node within the larger shop mapped as a way.

What triggered you to change this and others?

Cheers Phil

You also changed a Chinese Restaurant into a pub, osm.org/way/248378684/history/4, I assume because Rapid told you too. Such changes require a mapper to put their brain in gear and carefully review each suggested change. This often requires local knowledge and other sources.
Where a business has a common surname this is even more important.
THe proliferation of you undiscussed automated edits has made review a very difficult task for the DWG and the local community.

Bore da
What is the source of this name?

Diolch
Phil

Although the ref tag should only be used if signed on the ground, which is very unusual.
Cheers Phil

Hi Tom
Is osm.org/node/12716223148 really a kissing gate blocking the entire track? A kissing gate alongside a vehicle gate seems much more likely.
Thanks Phil

Hi Tom
I am happy to fix it. There are a few other things I can fix at the same time.

Cheers Phil

Hello
Andy asked me to use my local knowledge and look at his fix to the Leicestershire Round.
What I have spotted is that you have changed the track around the reservoir to a footway. This isn't really accurate, it can be used by service vehicles and mobility scooters. Footway implies something much narrower.
It should be restored to a track with access tags added along with a tracktype.

Hope this makes sense.
Phil

Hello
I know this edit was mad 2 years ago but if osm.org/way/33478285 is oneway and osm.org/way/1159381827 is private how do customers get out?

Cheers Phil

Thank you.
Looks a nice site.

Hello
Cash withdrawal fee is a very odd tag for a campsite, I assume it was meant to be something else?
Cheers Phil

Hi
Welcome to OSM.
We do not generally add proposed features until construction has began. Proposals are likely to change or may never happen.
Also what is the license of the official plans you are copying? Please can you provide a link.
Cheers
Phil (OSMF Data Working Group)