The problem with taking seed money from big VCs
cdixon.org
cdixon.org
Solution: don't approach the seed VC for a follow-on, skip it or postpone it until last resort, in which case the new alternatives can used as 'Stalking Horses' on the seed VC anyway if playing hardball.
Big VC seed money is a good endorsement and help for a company, and the upside is the chance of an easy follow-on from them because they have the pockets: but wait for them to come calling first, or have some Stalking Horses ready if you sense being played. Otherwise just skip them altogether on a Series A.
If I take $100K from a VC and that VC opts not to put in another $2Mil, everyone will wonder what the VC saw that made them not want to invest.
If they don't reinvest (for whatever reason, even if your company is in good shape), you will look bad. If they do reinvest, they won't be doing so at fair value.
If your business' prospects depend primarily on the outward appearance of your investors, it really shouldn't exist. And a VC that depends on another VC to "pick the winners" should just turn over their funds since they have abstained from their purpose.