I've worked for the past 17 years with people from India to Brazil to Russia and everywhere in between. Seriously, I'm actually laughing as I type this in that someone would be "informing" me of these cultural differences. I make my living working with people from around the globe.
If they (Proxmox staff) want to do business outside of THEIR own cultural little world beyond the scope that they have been already doing, then yes ... I do expect THEM to be culturally aware of how the business world runs.
Lastly, I know the difference between someone being frank vs recalcitrance and rudeness. If I spoke (or wrote) to a prospective customer in that manner, I would be out of a job (or very close to being so).
This is a forum about configuration and installation of Proxmox VE.
Please respect the forum rules, your posts are not related to the topic.