Rewards can encourage users to use exchanges and do more activity and trading to earn more points and rewards but I don't see how these rewards will make governments adopt? This is a strange and completely illogical idea.
It may lead to adverse results, which is governments banning airdrops and exchange tokens due to fraud, high risks, unauthorized promotion, and false promises to users.
Tokens basically started as a promotion for cryptocurrencies when it was difficult for projects to promote their services via social media, TV channels, or football matches, but the situation has changed now and these services should not get free promotion.