atm, it's 3 positions to settle...

bittrex: 14499.19442
b'ter:    20994

and most probably c-cex as well with a yet to be disclosed amt. of coins that'd be lost after rollback.
...still need to get to them (they strongly suggest using skype, meh... ain't my cup of tea tbh...)

so it sums up to:  35493.19442 SPARK of known losses to be refunded so far.

assuming a similar amount on c-cex, we should end up somewheere around 50k SPARK.
if that amount is fully known, that'd the exact amount a single insta-refund block should
drop, to set things straight with all three markets at once.

...VaultEX hasn't been included in the considerations so far, as I strongly suspect that no TX on after fork took place on that exchange....
but I'll make sure... just to be sure ...even if, this should be in an all good assessable range.