halfyear includes people trying out different instances; monthly shows just the one(s) they settled on

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just turn off the display of page edges in Inkscape?

For example you could do website hosting? Set up limits for each customer directory, configure PHP and Apache and sell space + bandwidth packages.

The price per month got pretty high recently, and it might be interesting to position a company as “for the long term” (the big providers all hide their true monthly cost behind an introductory period, so you would have to swap every 2 years to get the best price)

Standardized open format for documents might have been the only ISO meeting where people were protesting in the streets - https://en.wikipedia.org/wiki/Standardization_of_Office_Open_XML

So now ISO officially has two standard formats for the exact same thing!

Avoid using sudo and setuid by writing your own sudo program using setuid?

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This is one of the situations where subversion is better than git - svn “extern” can tag a specific revision of the library to be associated with each branch & revision of each project. Svninfo in each directory will tell your tools the version currently in each library the program is using.