  The upper bond on the branching ratio for $b\to s\gamma$ decays implies a
stringent lower bound on the mass of the pseudoscalar Higgs boson of the MSSM
if sparticles are heavy. This leads to an upper bound on the expected event
rate in experiments searching for heavy supersymmetric dark matter. Scenarios
with lighter sparticle spectrum and light pseudoscalar Higgs boson are still
possible, but only if $\mu < 0$, which again implies a small LSP counting rate.
