~snip~
My internet costs are fixed every month (if we are talking about home internet), and let's say that they are not too expensive considering it is a flat internet (no data limit), and that speed is around 40 Mbps. The price for that internet and fix phone is around 20 EUR per month. Considering that I spend a lot of time online, I find this price very good and currently it does not represent a big expense to me in my home budget.
I know that internet prices are different, and some countries like Cuba have very expensive and limited internet so your question makes sense. But I still think that the majority still pays too expensive and limited data + slow internet. This is certainly one of the most significant obstacles to a major BTC adaptation, as well as the fact that almost half of the world's population has no access to the internet. Welcome to the 21st Century
Personally, in my case, this is a big problem, I'm subscribed with a internet + phone and supposedly unlimited bandwith, however if you're going to look closely, they have a clause which they call "Fair usage policy". It is also around 20 EUR (but less Mbps), but the services really suck. I wanted to run a full bitcoin core here, but with intermittent connects and continue lagging here, I doubt that I can sustain it.
Our government is working to have some new faces to enter the market to provide better services, otherwise, we don't have a choice here, sad but true.