Is there a limit on the number of people that can be tagged?

[☑︎#VoteDemocrat]

I often get told that a lot of people don't get my tag-notifications when I post them...is there a reason for this?

 

[cook]

25.

 

[☑︎#VoteDemocrat]

25.

is it only the first 25 or after 25, none of them will be notified?