I run a forum site with MILLIONS of visitors and about 5,000 TB of traffic per month. Namecheap.com suddenly sent me a link warning that they will suspend my domain completely within 24 hours, if I did not delete two problem images (which were inappropriate/troublesome images but in the context of the forum posts, "a very poor attempt at humor"). I deleted the images and avoided being suspended, but the way they threatened to suspend my domain due to two images was ridiculous. If I missed the warning email or checked my email after 24 hours they would have completely suspended my domain. I'm talking about a site with MILLIONS of visitors per month and ten thousands of posts per day, not some small blog.
They may be suitable for some blog, but I can now say to NEVER use them for any enterprise site.