I didn't intend to post again today as I am getting so incensed at the way membership appears to be being boosted and need to take several deep breaths but I don't like ignoring a genuine question. Google in this - crowdfunding of Labour leadership - and several come up. I, too, have not been approached and I have had nothing through on this either from the local/national party or Saving Labour. I do know Momentum, according to the above googling, did set up one and I assume distributed it. How, and to whom, I do not know. I never get anything from them so I don't think they have access to the membership details. At least one I looked at did point out your vote was your own even if funded but I think they would have to do that anyway for legality. Indeed, I do know that Labour is very strict about who gets access. Even an MP's Office has to get special permission for their constituency.
Please note I am genuinely pleased that young people especially are getting involved in politics. I have long berated them for not doing so but I want a Labour Party full of genuine people who participate in a lawful, democratic and informed way. I am not even bothered if they don't know all the nuances as people have to learn but they do at least have to have had some engagement in advance and not just accept it as the 'in' thing of the moment.
Off now to plant some items in my minuscule courtyard.