On the other hand, repetitive ads are less interesting for the reader (at least, I feel that way when reading DF), so they have a higher 'cost' to Gruber. Thou

On the other hand, repetitive ads are less interesting for the reader (at least, I feel that way when reading DF), so they have a higher 'cost' to Gruber. Though this is more relevant to multiple consecutive sponsorships than a few of them spread over months.