Given that my suggestion to have sound alerts for invites received was not acceptable, then may I suggest you implement a system of recording invites received somewhere that I can check later to see what I may have missed.
At least then one can PM the senders and explain why it was declined, and that way we don't lose friends who feel as if their invites are always refused, when in truth they are just missed through negligence or because they are browsing the forums and just don't see the green invite button light up.
Please WGT consider this or come up with some process that handles invites in a more user friendly way.
Sent from my Galaxy Note 4
lol