IMHO I feel the title is appropriate. They are not claiming to have found life on Mars, they are making the very pivotal claim that there are forms of life that can turn liabilities on Mars into assets.
Agreed, the clear was very clear for me too. I wonder what the microbe eats, and if we can supply that in enough volumes to make a dent to Mars' atmosphere.
True, it is deliberately misleading. However, some possible indicators of life have been found on Mars although these are contested. Two thar I can think of are methane emissions on the planets, and the soil tests by the Viking landers in the seventies, which returned ambiguous results.
