Yes you're right, I'm afraid that if you don't reach the 100 followers before Saturday you'll be skipped from this round. I agree that it's not healthy for the people who just created the account to grow it artificially in just a week not to be skipped and I think a 2 weeks deadline would've been much better but this is the way they've decided so have to comply.
On the project's Discord channel there are a lot of people sharing their links to twitter in the off-topic sub channel, if you need to grow your followers base you can go there and follow the links for a follow back; it's much a better solution than using popular hashtags that eventually will make your twitter tremendously spammy, but I don't know whether it will be enough only with this.
Although I am not against adding this 100-follower rule, I do agree it is better giving more time for people to grow their twitter accounts naturally.
Now the requirement has suddenly increased from 0 to 100 which is too rush. I think it should be 50 for the first week and then 100 for the second week.
I think we should take a number of measures such as time to set up a Bitcoin account, time to create a twitter account. Will limit the use of multiple accounts and increase the quality of the Staker community.