I see that they have a Bitcoin Core (BTC) address posted. Unfortunately this version of Bitcoin hasn't been much practical use since 2017, when the banker/exchange/Blockstream cartel takeover of the original github repo and their troll army kept the capacity capped, effectively stunting growth as the user base grew, which is why miner fees went up to insane levels and transactions got stuck for days or weeks during heavy usage periods.

None of this was technically necessary, or part of the original development roadmap. Unfortunately, their massive disinfo campaign (including mass censorship by /r/bitcoin reddit mods) convinced most casual observers, newbies, and many (well paid) Wall St "crypto influencers" that the broken version of Bitcoin is the only "Official" one, while the open source developers keeping the vision of peer to peer cash alive (thus the fork name Bitcoin Cash) get called imitators and scammers by the very well funded mainstream crypto press.

Anyhow, that's a very brief summary of a lot of history, much of which I witnessed over on that site while the censorshop takeover was happening. The good news is that BitcoinCash still works reliably for a fraction of a penny to send, with multiple open source dev teams, protocol upgrades every year, and plenty of capacity to grow, if/when the rest of the world catches on. Our big weakness, like many nerdy open source development projects, has been in publicizing it in a way that educates without confusing nontechnical people, made especially difficult by all the noise and propaganda from interests that will stop at nothing to maintain a stranglehold on the world's money supply.

Getting back to the topic at hand, I see they also have Ethereum (also currently plagued by capacity/fee issues, which makes it less than ideal for use as everyday digital money), Monerp (great for privacy, but not ease of use/simplicity), and Cardano (haven't tried, or seen any compelling reason).

Maybe if they see some community support, the admins might hopefullyt add a BitcoinCash donation wallet option. It would certainly make it easier for me to donate, and I know for a fact there are hosting/vps/domain registration providers who accept direct payments in BCH (I use namecheap which works nicely via bitpay), so it could be possible to pay some server expenses without even needing to trade into fiat.