[Roel]

Well you are using
PlayerInfo[pLSPD][toplayerid] = rank;
So if you use /finvitelspd 1 3
the rank will be 3 not 7, because it overwrites the old data.
If you want players to not be able to use /finvitelspd 1 6 or higher, you should put a

pawn Код:

if(rank > 5) return SendPlayerMessage(playerid,-1,"Invalid rank amount.");

line above
PlayerInfo[pLSPD][toplayerid] = rank;

if you want it to increase the rank you should use

pawn Код:

PlayerInfo[pLSPD][toplayerid] += rank;

instead

pawn Код:

PlayerInfo[pLSPD][toplayerid] = rank;

And add a line above it like,

pawn Код:

if(PlayerInfo[pLSPD][toplayerid]+rank > 5) return   SendPlayerMessage(playerid,-1,"Invalid rank amount.");