Congratulations - and I know some of them must have been a struggle. We had a little competition going for our Summer Series about 8 years ago to see who had the most consecutive (including setting as an attendance). Just showed who hadn't had a decent summer holiday for 5 years!!!
Progress was hindered by partly living in Benalla, amd intermittent injury. I dont think the next 500 are going to happen in a hurry.
Aim for a hundred bush events instead. I managed 55 one year, so a concerted effort might take 2 years, + upwards for injury.
Just don't start on the parkrun "must haves" eg alphabet, compass (NSEW), The...., Wilson Index, stop watch bingo,and more. tRicky, a late convert to parkrun, has taken to it quite handsomely! We have Regionaires - all 15 of our parkrun events within the catchment area. I have 1 to go to retain. They went and added a new one recently - the Weetbix parkrun - which i nabbed last weekend. Now for the other new one - 2hr drive.
My approach to parkruns (on the very occasional attendance) is to start at the end of the pack, run and then bypass the finish, thereby leaving no administrative trace of my attendance.
One of our club members decreed his aim in life was to leave the smallest social media/electronic footprint he could.
Tinytoes. I have a brother in law with that objective. He works in the IT surveillance industry. No profile on FB, Twitter, Insta etc. All internet via VPNs. No Google id etc.
The obvious scary bit is that my friend is also heavily involved in such endeavours - so what do they know they aren't telling us?
The other person I know who for many years too such a path worked for the intelligence services. So I agree, what do they know? We probably can guess but would prefer not to be told.
We have Regionaires
I am four events away from cleaning out all the WA parkruns but three of them are quite difficult to get to (Geraldton, Porth Hedland and Kununurra). Perry Lakes I should be able to do next time we holiday in WA, though I have volunteered there.
At this stage I have more chance of doing all the events in ACT (it seems we may be going there at least twice this year) but I'd be closer to that goal if I hadn't gone and done Ginninderra as my first and second runs there (before I knew of all these 'achievements').
As for bush events, living in WA it'd take roughly 4-5 years to do 55 events (if you kept to WA, obviously if you travel for carnivals you can knock over five or six in a week)!