Suggestion:
Blocks over 60 days should receive a stake bonus (250-500HYP/// Could be any number, this is just an example) and the bonus increase over a month to month basis.
So lets say a block is 60 days, it would receive the normal 1000 stake+ (250-500), if the block is 90days +, it gets 1000 +(250-500) + (250-500) .
and so on, so for every additional months after 60 days you get an additional bonus stake reward.
It can lead to uncontrolled inflation. If now the bigger number of small blocks has a downside of the longer staking time and thus the smaller APR for each block, then with a bonus it won't be the case. And one day we can see millions of HYP staked in 24 hours.
I understand what you mean, but the bonus could start at even 4-6 months and only 50 coins bonus for not breaking the block for very long time.
We can also go in reducing the rate.
If we reduce the rate, we will lose our competitive edge. As to the bonus, we should be very careful with something that can accumulate progressively and be exploited. Imo, losing the weight is already a good incentive not to break a block.