Hi, I wonder if it's normal, i have made some good changes to make better ad placements but since few days it's really increase and the niche is not that great.
for a niche not that great, i think it is good. for example, proxy niche is not great and pays low which usually gets 1% CTR on average. compared to that as you said your niche is not great, your CTR looks good but try different ad placements since the site is new. you never know what your visitors will like