Bandwidth isn't free. However technology makes it cheaper to produce every day.
My cable internet has the same cables it always had for decades. As the companies course of business where they replace their technogy it gets faster and faster. So for your current price you should expect increased bandwidth.
When I was a kid I use to run a BBS. It was first at 2400bps. Then after the modem died I went to 14.4k my users liked the extra speed and there was no way I could find a 2400bps at the store anymore. Then after that died I went 56k modem.
Having a modem die was part of the risk running a BBS replacing it cost money but it was mostly the same amount each time and we get faster speed.