Nik.
No offense, but you seem to not know the difference between 'inviting' and 'spamming'.
The membership in this group is pretty closed, so we've all gotten your multiple pm's and seen all of your posts such as this. There is no need to continue blanketing this group with your advertisements. If someone wants to go over, they will. Perhaps some already have. The rest have already, for whatever reasons of their own, decided not to.
So please stop.