I used to work for the Ads team at Meta and I moved to the infra org 6 months ago. 
Everything that was said above is true. Your expectations are higher in Ads vs other teams. 
The bar is high and people tend to overwork in Ads because of the pressure of psc and also it's intense because of the revenue generation. 
Some of the oncalls are pretty stressful because again you need to stop the $$ bleed. 
Having said that.  I have seen people getting promoted faster in Ads, it's easy to show impact ( $$) 
If you like working in a high pressure environment and like to grow faster.. then take it. ( Also remember you need to get to E5 in 33 months at Meta ).
I now work for an infra team and it's much relaxed here but again the growth is slow.
DM me if you want to chat more