[luser001]

will be meaning mandatory? No, there isn't.

I've downloaded and used the 5-user version of the wiki (Confluence) and I didn't pay anything more than $10. I expect this to be the same.

[gouranga]

The moment it breaks you will need one...

[nirvdrum]

The maintenance contract is another $10 for the next year (assuming you're still < 5 people). And you get software updates during that period. It's not particularly devious.

[esusatyo]

Well does your Windows XP breaks? Does it still work? Of course it still does, but you will have to pay if you want the new stuff.

[luser001]

It hasn't broken for me. And I don't expect it to. YMMV.