You know, when they are only readers, I guess we look a bit like the enemy.
I mean, we give them content to enjoy but also bother them asking for likes, comments and support 
Like enjoying a series and have to bare with the ads, no?
The point is, in psichology related with marketing, repeating is the key. They say the more you get to see an ad about a product, the more you get familiarized with it, the more likely you'll buy it 
And reading things like: "I forget to give a like if I don't see the message in the update" presses in that point really hard 
Even so, it comes to a time when you desensibilize and stop seeing the ad even if it's in front of you 
But @graveweaver made me thought. Maybe changing the ad makes something, at least there're those brands that make various versions of the ad, no? 
I'm having an epifany... 
I'm not an expert, don't get nuts, eh? 
Also, it's not worthy if the quality of the product doesn't meet the level of exigence of the potencial client 