Right, I guess my understanding is that he makes around $1m/year (very likely less) through his streaming co-op. He has to pay himself ($250k?) his producer ($200k?) and an editor ($80k?). Travel and production costs are probably around $100k, probably a bit more.
That leaves around $400k available for political donations. People in the left-media space attest that he does make donations to various orgs without announcing it all the time. Since this is under the table, we dont really know where this funding goes, but I an willing assume he is generous toward Palestinian liberationary causes at a minimum. It's not exactly building a vanguard, but I don't have an issue with directing funds toward staff or resources for those orgs at all. I guess I could speculate further, but we are talking about a couple hundred thousand year at this point. It's not enough to make-or-break the success of the left, if the vanguard depends on a couple hundred thousand a year from a single streamer, it is not robust enough to take and wield power anyway.