There is no doubt that the Vulcan is a fantastic sight in the sky and is always popular at air shows.
However, is the support of it distorting the market for donating to other equally worthy, but less costly, types? I can't recall the actual costs but I believe it is somewhere near £1M per annum. Such a figure would keep the Sea Vixen, for example, running for 10 years at least.
I have seen at various air shows small aviation charities almost begging for donations from the public only to be completely overshadowed (sometimes literally) by the VTTS juggernaut.