What if Sightstone wards gave a some gold to the owner every time they spot a unique enemy?

Hear me out; The idea may be quite optimistic, but I think it could solve a lot of problems for all the positions at many levels of play, but I'm also open to suggestions.

Income for supports is low? Give them a boost to income if they bought a sightstone (and then redemption and other powerful items can be raised in cost for other positions that don't buy sightstone).

Your support doesn't want to ward deep because they'll lose income from relic shield, coin, spell thief's edge, and masteries, ADCs? Bam. Now invades still carry a risk, but the income loss doesn't punish supports for successfully roaming to give better map visibility, so deep warding will happen more.

Worry not, Mids and Junglers, since now the support has more gold to protect the ADC and they both have more vision now, they won't necessarily need your help so often. Furthermore, if bottom is less lethal of a lane, then the lane won't absolutely determine the course of the game as much.

Top, if your jungler isn't so focused on bottom lane thanks to the inflow of warding in the bottom half of the map, that means the jungler can focus on warding and assisting YOUR LANE more.

Now the amount would not be huge. Maybe 25 gold per unique enemy, or a little less than a full minion wave for an excellent ward that spots all enemy team members. Furthermore, there would have to be a timer between sightings for champion sightings so people don't spam four wards in the middle of a team fight for a quick 500 gold. Maybe a thirty second timer unless the wards are, say, two thousand units away from each other.