We've only heard from the monkey through the medium of a tabloid and now the silence is deafening. I don't think there is much profit in placing too much reliance on that although it was interesting to get information about police searches not in the files to which we have access.
I think the good news is that Scotland Yard are not making any obvious preparation to let us know they are starting to wind down. Quite the reverse if they are asking for continued funding to keep going.
In 2010, there were around 3,630 Sure Start centres. By late 2017, the number of Sure Start centres had fallen by around 1,200. The National Audit Office found that spending by councils in England on Sure Start fell by 50% in real terms from 2010/11 to 2016/17.
Spend the £300k on something that will positively impact 1000's of young lives.
If the McCann's want to continue searching, then perhaps ask the public to donate again - let them decide.