It appears they have been accepting BTC for about a year, it’s just the link is hidden at the bottom.
I think this needs to be up near the PayPal section, that way when people see it, they will be curious what Bitcoin is and start reading up about it. Thus, not only is this thread about Wikipedia accepting BTC, which they already do. It is about spreading awareness of BTC.
And that's the reason why they won't make 'donate with BTC' too visible. People who are about to donate get distracted and start checking what the bitcoin is (abandoning the 'donate' site).
That's what happen to Mozilla, they've run some test analysis for 17 days when Bitcoin was listed along with other payment options. Eventually they also decided to hide it. Can't blame them really, their goal is to get more donations not to promote bitcoin.
See my post from other thread:
...
I know that they are accepting it if you do some research BUT why hiding it ??
...
Why? Likely for the same reasons Mozilla removed bitcoin donation button. It distracted page viewers resulting in less donations.
https://fundraising.mozilla.org/bitcoin-donations-to-mozilla-17-days-in/We received numerous requests from donors that they wanted bitcoin featured right on our primary donation form. Given the volume of page views to that form (millions during the life of the campaign), I was concerned that adding any unnecessary text would distract donors and depress non-bitcoin conversions, the source of more than 99% of all our campaign revenue. So we decided to add “Donate with Bitcoin” text, and test whether it depressed conversion or not. Here is what that looked like: [...]
The test showed that revenue per visitor drops by about $0.07 USD. Here is the Optimizely graph showing a 7.5% reduction in revenue per visitor:[...]