Dear Chaim,
To follow up on my previous suggestions, what if we choose one Israeli website at a time and see what the cost is for advertisement for one month or week, preferably around a major Jewish holiday.
Next thing would be to address the members of JTF to raise money for this specific project. Obviously, all financial information on this project would be transparent.
In addition to that, I suggest that all promotional materials contain the following message:
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IT IS NOT ILLEGAL TO JOIN US, IT IS A CRIME NOT TO!
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What do you think?