After the speed check, one of the "ads" that follows is the offer of a security check.
If you haven't told that, I would not even have seen the option (soon).
I too thought they where just promotions of other avast products and didn't scrolled down because I never expected the scan option to be there.
For sure something to change in the UI in my opinion.
I suggest...
At the top :
More by Avast - Storage - Smart Scan - Wi-Fi Check - Tools
Close underneath it the two (or 3) buttons like :
Scan Wifi - Test Speed - (Do both)
A little space and then the promotion info
Ofcourse avast is commercial company and they need to make money.
I understand why and accept they promote their paid products.
The way they are doing it however for the last few years is chasing customers rapidly away.
It seems that those decision makers are death and blind for what is happening and refuse to change things. *SIGH*