well on my gauge a new chain starts about 0.5 and I dont replace it until 1. SRAM 1×11. Get a gauge and do your chains yourself and save money. I get 4 chains easy to a drive train over the year. Put a new chain on and measure it and go from there.
On 1×11 this <<span style > he’s had to replace his cassette < means the front ring is too big. He should drop down a size or 2 and get a better chain line ie pedals mostly in the centre of the cassette on the metal rings. The biggest ring is made of aluminium so it wears quickly. Should only be used for the very steep bits. Or, get fitter :-)
Start maintaining your own bike and you will save a load of money.