I've emailed 3 times about the 6 or 7 invites excepted through the link for my account and i did not receive the spirit stones and the 2 i recieved before were cut to 50 before the update.
SS decrease for invite and not being given out
had the same problem.. im owed for 3 friendinvites atm.. but dont count on webnovel to honor their promise of ss for invites....
basically if they remove friendinvites completely (which this probably is) they are gonna lose about 40% of all their readers.. which might (hopefully) lead to them either reevaluating how greedy theyve been or that the site just shuts down all together....
Then all the novels could go back to ppl who actually care about the readers and the novels...
I also have received a reduced amount of so for inviting friends
I’ve had 20 people use my invite code for the past two days and I only received half of the previous SS invite amount ;-;
I really wish it was returned to the way it used to be as 99 SS 
I also received 56ss instead of 99ss
need to solve that early please because every chapter is so expensive
It look like it’s not a bug look at your account level the bonus of stone for invite friends had disappear...