Inconsistency of grades awarded is also a fact of life in third-party grading. Sometimes a book will receive a higher or lower grade than it 'deserves'.
Though turnaround times fluctuate, many collectors have complained that the grading wait time extends well beyond the posted timeframes on the CGC website.
The above statements are from a review that I found. Sound familiar?
Their lowest fee for comics appears to be $20 for a 14 weeks turnaround.
The article goes on to say that they slab around 100,000 every year, so they may have to ramp it up if they start slabbing sportscards.
https://www.sellmycomicbooks.com/cgc-comics.html