Dunno about "paying for development" since among the family of coins merged-mined alongside BiTCoin it was traditionally supposed to be DeVCoin whose focus was supporting the development of free open-source software.
So the Ixians have been focussed more on actually building a presence within the open-source metaverse that DeVCoin is supposed to be supporting the development side of.
I am not sure why we don't seem to see the Ixians officially represented on the Galactic Diplomacy planet, maybe because they want to launch an official Civilisation first or maybe at least partly because the Crossfire RPG window into the metaverse is less easily scripted than for example the CoffeeMUD interface thus not so obviously amenable to "CPU mining" / "play to earn" type automated earning of resources with which to build up their presence and accumulate "reserve assets" for the IXCoin treasury.
For many years though a character named "Ix" has been on the fantasy-milieu side of the CrossCiv server offering to buy and sell stuff for IXCoins. Maybe he or she found that to be lonely-enough work that they have not bothered with the Sci-Fi milieu side of it or maybe just haven't bothered to bring attention to whatever characters they might have on that side as being repsentatives of Ix / Ixians / IXCoin.
I do know that at first (meaning over a decade ago now) they had been holding back a while from the Civilisations aspect of the metaverse hoping that DeVCoin would do well enough to go beyond merely supporting key software such as FreeCiv to the point of actually getting new civilisations added (that is, to get a Galactic Modpack, including graphics thus able to implement entire new nations, rather than just a Ruleset as in just the text-file config files) so they could have the nation of Ix as in the DUNE mythos and try to make technology their "thing" like the Ixians in the DUNEverse did.
They also raised enough resources in the CoffeeMUD side of things to create themselves a clan, marrying with the Darlings to test out the type of clan called a "family". Breeding has been slow so the Ixian family is still rather small, though pregnancies are progressing.
http://MUDgaard.knotwork.com:27744/clans.cmvp#IxiansThe clan has taken over a town and built themselves a custom clanhouse, but isn't particularly rich because they have been researching future products rather than simply maximising their production of easy standard fare such as metals, stone, and foodstuffs.
Specifically they co-ordinated with the Darlings to tool up for soap production, only to discover that the version of CoffeeMUD in use at the time was producing soap of zero pounds weight, which is not practical for real use. They continue to stockpile ingredients though in hopes that a future version will yield workable soap. They expect everyone to be wanting soap because at least in theory it should make the process of bathing faster, and all worker characters need to bathe regularly as part of their scripted work schedules. Less time spent bathing should mean more time available for mining, gem-digging, foraging, farming, smithing, cooking or whatever other productive activities characters have scripted.
So yeah there are plenty of activities available. Check out what artisans can do:
http://MUDgaard.knotwork.com:27744/classes.cmvp?CLASS=ArtisanUnfortunately however it turned out that running Artisans in the CoffeeMUD is so massively lucrative that it did not take long before the ability to just start up a player-account there for free had to be closed. Maybe with a bit of research, which can be done for free by playing any of the many free CoffeeMUD instances that exist, you could help come up with some reasonable ideas about how best to limit the addition of new players and/or how much it would be reasonable to charge for a player-account either as a one-shot purchase or as a yearly subscription in order to avoid having millions of players join and earn billions of coins of various types maybe without even covering the bandwidth and server costs of running servers...
-MarkM-