On X, follower count is credibility. Journalists, founders, CAs, political volunteers and crypto/finance accounts in India all live and die by it, because people decide whether to take a tweet seriously by glancing at who's tweeting.
X followers cost more than Instagram followers — the platform is stricter, so good accounts are harder to supply. Choose a refill service (30, 60 or 90 days) for your main handle. The cheap no-refill options are fine for new or secondary accounts.