As it’s only a matter of pennies, it takes a lot of texting in order to make money.
Mobile technology continues to advance, and as it does, so do services such as phone sex.
There used to be a time where phone sex operators had to work over landlines.
It is possible to sell phone numbers (usually done as a store item on various networks). If you go this route, definitely make sure to use a different phone than your normal phone, with an area code that’s far away from where you really live.
Also remember that it takes time to develop a following and customer-base.
4-figures monthly is reasonable, and 5-figures monthly isn’t far-fetched for real ambitious performers. Some performers are a better match for the industry, and those that put more into their work will generally earn more than others.