What do you mean by clones? If they have the same content, are they mirrors? If they have different content, how do you expect or want it to be different? Is the existence of Conservapedia a good thing?
Clones: general wiki encyclopedias with different administrators than Wikipedia.
Mirrors: no, but there is no restriction on manually copying large quantities of information from Wikipedia.
Different content: nothing necessarily different.
Conservapedia: sure, it's a good thing, but not something I would personally support.
Most large public wkis are "Wikipedia clones" to the extent that many of them use the same software/wikitext standard (MediaWiki), article naming conventions (which allows guessing the name and linking to an alternately-hosted article by simply switching the InterWiki prefix) and/or licensing (allowing for both mirroring and for sharing derivative versions)
The easiest way of supporting such clones today is probably donating to promising efforts (many of these now exist, albeit with varying levels of compatibility) and supporting CreativeCommons, who manage the underlying legal infrastructure making comprehensive "clones" possible in the first place.
(Although the post may not be directly relevant to LW, I suspect I have an actual answer to the question.)
Speaking as a Wikipedia and Wikimedia volunteer of several years, I agree wholeheartedly with your concerns (though money is still lovely). The likelihood of disaster is not as high as it was, but many things are far too centralised.
I've been thinking about how one would fork Wikipedia, but have held off talking about it in e.g. my Wikimedia blog precisely because serious and acrimonious discussion of forking has been in the air, and it would come across as furthering the acrimony. Whereas I'm thinking more in terms of basic backup hygiene, against unfortunate meteors - physical or legal - hitting the Wikimedia Foundation.
So if you're feeling inspired to do something particularly useful, try this project I keep failing to get around to: spend your money on a spare PC with several terabytes of cheap disk, get a Wikipedia dump and see if you can actually use the software and configuration files provided by WMF to set up a working mirror copy of Wikipedia. And report back every step of the process to wikitech-l, so that the resilience of the encyclopedia can be improved - I can assure you people will be helpful and interested.
(The other two prongs of a fork are bringing a sustainable community with you, and having the legal structures to protect your project. Those are important things for someone to give serious consideration.)
The main thing I have to say is this: however much you would otherwise have given to Wikipedia, give that money to some other charity. Never make decisions about how much giving to do based on the worthwhileness of individual causes.
Downvoted.
I don't see the point of the post. Are you looking for feedback on this philanthropic strategy, trying to rally others behind this idea, signaling your opposition to "letting the Wiki win," or what?
What is the relevance of this to LW? (The answer to the first question might cover this.)
"Rationalization"?
my rationalization is this
Do you mean "rationale"?
Edited for formatting.
I donated to Wikipedia before. However, this year, I'm not donating, and my rationalization is this: there need to be more Wikipedia clones on the internet, to best prevent the possibility that a single organization (Wikimedia) abuses its control of the biggest worldwide information source. Thus, instead of donating to Wikipedia, I would like to subsidize potential Wikipedia clones. Whether or not it has ads is of little concern to me.