Returns streams broadcast by one or more specified user login names. You can specify up to 100 names.
You can only specify 100 names (or 100 user_ids)
if you specify 300 ID’s I’d of expected an error, or it will return the first (or last) 100 specified, or you just get confusing results.
So to do 300 names/IDs, split them into 3 batches and do 3 requests of 100 each.