Suggested lottery prizes:
City connect voucher – maximum one per era
A money jackpot – like the Gold rush, rare but completely fills your bank
A prestige reward comparable to era – for example 1000 prestige in Era 6
A worker contribution voucher – value 100k per era so Era 1 – 100k, Era 2 – 200k etc.
Competition suggestions:
Increase the frequency of competitions so they are every 2 or 3 hours
Cheap Build Voucher as a prize
Track Voucher
Instant Upgrade Vouchers
Maybe rare – city connect voucher
License voucher instead of license for goods
‘Surprise prize’
Boost vouchers
Mechanic vouchers
Instant Dispatch vouchers
Bonus Engine upgrade voucher
These are just my suggestions from experiences I've gained as a player, and things that I would love to see implemented in the game.