This is generally less than one FTE for an AI safety organization. Remember, there are other costs than just salary.
MATS is spending far more than £500k/year. I don’t know how accurate it is but it looks like they might have spent ~$4.65MM. I’m happy to be corrected but I think my figure it more accurate.
Vetted causes, I agree with you that Sinergia shouldn’t be deleting column W, especially at this time when this is happening. I think they should put it back up and add more explanatory comments if necessary.
That said, I think you are perhaps assuming too much bad faith in this whole ordeal. It seems extremely plausible to me that an ESL person would confuse a small word like this and I think you are coming at this from a perspective where you are assuming mal-intent and are finding corroborating evidence for this.