Bro, most of the stack L2s are literally shopping for grants before choosing the stack that they will launch with. For the vast majority, this is the primary and only reason for going with a given stack. Some would literally come to you with "X is offering me 10M in token incentives, if you offer me 12M, I'll go with you". Same goes for picking DA layers, btw. So no, a project picking Solana because of a grant is not something that is unique to Solana.