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If you’re in a real rush to post images, you can always acquire a
Copper Membership to jumpstart the process. Otherwise, you’d have to reach Jr. Member rank, which requires an Activity>=30 and at least 1 Merit.
The Merit thingy is not that hard to obtain at all, and all one needs to do is to dedicate a bit of time to performing a few searches in order to obtain tones of posts on the topic (there are more than those on the topic of Elon Musk). There are even some threads that, provided the conditions are met, are a piece of cake to get a few merits in exchange for proving some minimum bitcoin related capabilities. Otherwise, it's as simple of posting decent enough content (i.e. well versed, non-plagiarized, non-spam, non-crap).
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Some are already referenced on this same thread.