I don't think it's hard, and there already are plenty of easy ways to get SG: log in daily, log in every day for a week, play minigames, level up (past level 3), use the free codes, open the free chests and sell the runes...
The only downside to it being easy is that it takes time and/or doesn't give many SG. If there existed easy ways to get thousands of SG, gamehag's economy would be ruined, unless prices were increased by several thousands of SG.