Having worked at a company that had a massive influx of GDPR requests we weren’t prepared for, this one could actually cause them some trouble if Reddit don’t have that process properly automated.
This is the same for me! "A message will be sent to your reddit inbox" complete silence. Though the submission message said it could take 30 days or something.
The GDPR states, that request must be completed within a month. In case you're from Europe, you could report reddit to your local authorities if they don't respond within that time frame. A single report won't probably cause a reaction. But several reports from several individuals on the other hand...
Oh I wasn't aware of this. Very tempting. Now I lowkey wish they miss the deadline on one of the six accounts I requested the data for, so I can do some European style trolling.