Wrong choice of words there, abusing wasn't the correct term, but I'd still say that it probably wasn't feasible to keep paying 1% extra on those large jackpots.
maybe enabling this lottery again in the future with like 100 tickets max per user can help the situation ( if you considered bringing them back of course )
I'd probably go with 1000 tickets. With the price of BTC going 10x in the last year that would be a logical adjustment.
That would definitely make it a bit more fun and would still allow for pretty big jackpots.