This really should be called LEVELLING UP WITH SWAGBUCKS. It has nothing to do with stacking.
Congrats though on the new level. I think @mmoore01 is on level 6 Topaz with me. That one takes while because I think you need $2,500 lifetime earnings to get to level 7
@Icequeen813 congrats! You can see the year you joined by clicking the drop down menu of your current points. Then click on your name with the gemstone and it'll be at the top -
First, from the home screen of app, choose EXPAND near the center of the screen
Then choose MEMBER PROFILE. Your MEMBER SINCE and level are directly below tour name. Also, this calendar on this screen is instrumental in tracking your daily goal.