The real sad part of this is that
1) The WT owns all the Circuits - these funds were only really used to support assemblies.
2) The WT already imposed a tax on the use of assembly facilities in the US and Canada (not sure on UK or Europe) of 5-9/publisher per assembly day, above and beyond the use charge per publisher.
Overall, this arrangement is really a nickle and dime way of ensuring that they get every penny faster. As an example most of us hear from the financial report that we started with $BB then had expenses leading up to assembly and assembly of $EX - the elder then decided to make a donation of $DN to the WT and we have received donations of $IN etc. leaving a defect of this assembly of $EB. (I have never heard a surplus)
This always excludes the donations that come in after the assembly announcement, so this letter really says that we want those monies faster.
Not rocket science, but it does say they have money issues. Its not big funds.