Because, like you said, they want more money now, they problaby looked at Vumatel and saw, fark this, lets do the same, make them pay more if they want a higher upload speed
Vumatel offers10/2; 10/10;
20/2 and 20/20.
On Bitco that is R795 vs R875 for uncapped, unshaped and unthrottled.
All the way up to 200/20 and 200/200 R1425
Unfortunately Bitco is still in the negotiating process with Frogfoot so I can't say when it will happen. I can only speculate it will probably be sometime in June.
SADV offer 10/10 R599
20/20 R799 up to 100/100 R1199.
Also uncaped, unshaped and no throttling.
Openserve 10/5 R695
20/10
40/20
100/50
200/100 R1745
So yes, all these speeds depend on a number of factors, starting with the data transfer speeds offered by the cable providers. And ends with the ISP either shaping and/or throthling(mostly this), and rarely no shaping or throttling as is the case with Bitco