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Yes probably cheaper after 6+ months. If you need to synchronise files (that Office 365 usually does for you) then just use a free Dropbox folder.
Cloud storage is very cheap.

ditto.

I have their software, with working keys, on 4 machines over 6 or 8 years with no problems.
I don't know how they do it, but it is all above board and I really can't see why anyone would...

Activation code by email. That's it, but good support. I had one that didn't work a few years ago, they responded to email in 5 mins and sent out another code.
I have years of happy code activation...

I've just bought Office 2019 from them for a standalone licence, That's what you need.

£17.24 all in, lifetime purchase

It's £199.99 on the microsoft homepage and stupid Office 365 is...