One big negative aspect is that everything tends to cost around $10/month, from a verified Twitter account to an app to teach English to my children.
Now, it may be small change for single people with Silicon Valley salaries, but I have a family to feed on my French experienced engineer salary, and I basically have around $150-$200/month left for entertainment for the whole family.
I cannot buy 10 internet services, whereas I could perfectly afford buying, say, a dozen or so $50 software a year.