A non npc pop up when u log in for the first time that day that gives u somthing like

 

A egg (with a baby mon)

Some money like 10k

Like 2 coins?

Some berries

A rare candy

 

This would encourage players to play daily and would be rewarding and not break the economy

 

As a early game player u dont have acess to bosses or the daily quest npc so u dont have any daily login reason and it would just be nice to get rewarded for playing over a lomg period of time

I like the idea of it being similar to Black Desert's daily reward (low rewards that increase as long as you log in every day consecutively server-time based). As long as it starts low and the top reward is not really big, I think it's a fine idea. Maybe also add a minimum time to receive it (10 minutes online, for example, per day) instead of just logging in, grabbing it, logging out. However, pokestops also exist as a similar function, even though their cooldowns are 36 and not 24 hours.

 

I'm in favour as long as it's balanced.