Its not ordinary SCAM but ... The facts Beam dev wrote in his Medium article are celarly true.

Its hard to argue with these facts:

1. GRIMM is just a rebranded BEAM
2. All that hype about assetchains wasn't developed by GRIMM devs (the assetchains was developed earlier in BEAM but are turned off due to bugs - all that GRIMM devs done was turning those option on)
3. GRIMM has no dev reward but has set low difficulty on beginnig so massive amount of coins were mined very easliy at the beginning