An adult website is just like any other website. If the adult website does not grow, it will have the same server requirements as a typical website on standard Shared hosting.
However, if adult websites do grow, they will eventually require more space, a larger database, increased server performance, and more international traffic. Web hosts need to account for a higher risk of misuse (such as website infections) and sufficient performance reserves for sudden traffic spikes.
Where to Host an Adult Website?
Let's look at a real-world example of a website we host. Years ago, a client purchased standard web hosting for 25 CZK. After six months, we contacted the client due to overloading the hosting server, and we performed a seamless migration to adult hosting. The client stayed on adult hosting for a year until they reached the performance limit for adult hosting. The website was successful, so the client had enough funds to move to a managed VPS server. We installed ISPconfig3, fine-tuned the server, and the client was very satisfied. The client found that having their own server with ISPconfig was fantastic, and the single website on the server grew to nearly 200 websites. Even a VPS server has its limits, so a few months ago, we purchased a dedicated server for the client, virtualized it, and performed a seamless migration of the VPS server to the dedicated server. From monitoring, we discovered that the client's dedicated server deserved its own link to the transit, so now the client has a powerful dedicated server and their own link to the transit. If the client becomes even more successful, we can set up their own cluster, Cloud, CDN network, or other solutions.
This real example shows how a project can progress significantly from hosting for 25 CZK. Every successful project requires a lot of work and energy, and it is necessary to accept that you will migrate your project several times. Of course, it is possible to start grandly and begin directly with a high-quality VPS server.