Hey you found a good one here, however to answer your question custodionship plays contrary to popular belief are not affected by the September 18th deadline much. What they will do is repackage those tickers into available tickers. In which most Spacs and RM brokers will grab them up and start getting companies into them. I wouldn't worry so much about them keep them on the side and wait them out if you got in cheap, then you will only gain.
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