With some experimenting my income almost went 3 folds in last 2 weeks and all of it is coming from just 2 new channels i added. With much confidence i have added few more channels where iam sure will generate more CTR. I am expecting more revenue in coming weeks. Will this raise any triggers? With all these changes my earnings are going to be still less than $100 per month. Not a big amount, but worried about the jump my account is going to make from low teens. Any advise?
It really doesn't matter how your earnings etc change, as long as you are following the TOS. Google won't ban you for a massive increase in traffic or revenue, unless you are breaking the TOS.
No need to worry as long as you didn't put pictures next to adsense ads or something. Google wants you to optimize. No problem at all.